User Stats

Rank: 1022
Karma Score: 491
Joined: February 26, 2021
Submitted Stories: 169
Published Stories: 0
Comments: 0
Votes: 170
Group Name
Membership unavailable

Following

No Following!

Followers

No Follower!

Stories

The intelligent development of organic fertilizer equipment is the requirement of The Times

Organic fertilizer equipment manufacturers highlight the automation of equipment. Now the most important thing in the development of science and technology is the full automation of equipment, improve efficiency, promote production and speed up production. Organic fertilizer equipment manufacturers need to consider the characteristics of demand in the entire market when selling. Driven by the industry, step by step to get rid of backward, with a strong strength to serve the public. Although through past efforts, compared with the original equipment strength improved a lot, but these can only represent the past, and can not guarantee that in the face of future challenges and competition can easily cope with, to achieve sustainable development. In the face of the changing market, we should always keep a clear mind, and carry out systematic reform and innovation on the organic fertilizer production line based on market demand for development, so as to meet the market development trend, expand the application space, and strive for more development opportunities. Only by following this pace of development, continuous learning and continuous reform can we go further and further on the road of development. Whether in order to better serve the society, or in order to more fully show their own value, will maintain a firm development attitude, in the difficult growth of the road forward. Firm belief, unremitting efforts will be able to push the organic fertilizer production line to a new height, so that the overall technical level of the machine industry on a new level, the future will be able to create more miracles and values, it is worth our common expectations. So customers do not have to worry about how to transform organic fertilizer equipment, let us believe that the equipment will have a great breakthrough. In this era of fierce competition, enterprises need to make unremitting efforts to improve themselves and realize humanized intelligence as soon as possible, which is not only the development direction of enterprises but also our common expectations.

Organic fertilizer production equipment is active in the market

Huaqiang Heavy Industry Technology Co., Ltd. is engaged in the production and research and development of organic fertilizer equipment, compound fertilizer equipment, organic fertilizer production line, organic fertilizer production equipment, etc., but among the many technical equipment, the enterprise always focuses on the production and sales of organic fertilizer production equipment. The theme of the development of organic fertilizer production equipment in the market is to be able to achieve a better market development position, market development position is very important for each product and equipment developed in the market, in the market often see such a scene, that is, the closer the position of the product and equipment in the market, the less exposure in the market. And the best development in the market, that is usually in the market development position is relatively advanced, and is also the most active product equipment in the market, so they appear in the market times will definitely be much more than other products and equipment. This is also why equipment in order to grab the best market development position, and continue to improve their own market activity is an important reason. Almost half of the organic fertilizer production equipment in the market exists in a relatively rigid form in all walks of life, and it is precisely because they are too rigid that they do not have any new development achievements in the market, and gradually they will be forgotten by the market, and they will slowly lose their only spatial position in the market.

The inevitability of the production and development of organic fertilizer granulator

In terms of today's market environment, there are many equipment for the production of organic fertilizer, and there is a good market in the domestic market.

With the growth of the market economy and the expansion of market space, China's organic fertilizer granulator manufacturers are also more and more, and with the gradual saturation of the market, China's production enterprises are also beginning to gradually develop new equipment, gradually differentiated market, will make China's organic fertilizer equipment can better meet the needs of consumers.

Although there have been a lot of mechanical equipment, such as organic fertilizer equipment, compound fertilizer equipment, organic fertilizer granulator, compound fertilizer granulator, double roller press granulator and other equipment, but because of the increase in customer demand, as well as the backward production technology, will continue to promote the manufacturers to develop compound fertilizer equipment, this complete set of fertilizer production system. Only when the production volume has been solved, but also the development of the enterprise has been buffered, so that there is more time and experience to develop new equipment, enterprises should better thank the emergence of organic fertilizer granulator, led to the development of the market economy. Therefore, as a high-end formal machinery production enterprise, whether it is the production of organic fertilizer production line or a single organic fertilizer granulator equipment, it will gradually integrate with the international market and gradually move to the door of the world with the development of the commodity market. Therefore, whether it is for the emergence of all kinds of machinery and equipment, or organic fertilizer granulator, there is the inevitability of their existence, because of the development of the commodity market, there will inevitably be more equipment to better meet the needs of consumers.

Organic fertilizer processing equipment and agriculture complement each other

Usually referred to as organic fertilizer cultivation mainly refers to the arrangement of a certain area of crops, green manure and forage grass in the rotation cycle to increase soil organic matter, improve soil structure, through its associated rhizobia fixed free nitrogen in the air, supplement and enrich the nitrogen nutrition in the soil, to achieve the purpose of organic fertilizer cultivation of the field. Organic fertilizer production line manufacturers will do a better job of equipment, so that our agricultural development is better developed. Ensure that organic fertilizer equipment and agricultural development complement each other. Under human intervention, the land can be planted for better or worse. The adoption of unreasonable farming system and neglect of the combination of use and cultivation often lead to the consumption of soil organic matter and the loss of nutrients, which leads to the destruction of soil structure, aggravates water erosion and wind erosion, and decreases the yield year by year. In response to this situation, as early as the middle of the 19th century, Germany's Liebig put forward the theory of return, advocating that through fertilization to recruit the nutrient elements taken away with the harvest, return to the soil. Later, according to his analysis of the soil formation process and the essence of agricultural production, Williams of the Soviet Union pointed out the dialectical relationship between nuclear production, animal production and soil acid management, and believed that agriculture, forestry and grazing must be combined in order to enrich soil acid and improve crop yield. On the basis of summing up the experience of traditional agricultural production, Chinese agricultural scientists have also come up with the principle of sufficient land, accumulation of nuclear land, and combination of cultivation. It is pointed out that the purpose of land use and the means of land cultivation are to ensure land use in order to provide more agricultural products. Before the establishment of the modern fertilizer industry, the main means of restoring and cultivating soil fertility were the application of farm fertilizers and biological cultivation. With the progress of science and technology, the effect of organic and inorganic fertilization is becoming more and more important.

How to achieve long-term development in the price of organic fertilizer equipment

Many organic fertilizer equipment companies develop a certain technology and sales strategy, often on a whim, imagination, think more, do the effect is not ideal. All said that any organic fertilizer equipment price research and development and sales are based on reality, fabrication, out of the market is just empty joy. Conduct a detailed analysis of the market, understand the market demand, and then work out the corresponding development plan. Organic fertilizer production line equipment is to follow such a research and development process, based on this concept of the plan to better meet the requirements of users, put into the market with the fastest speed to conquer the market, sustainable development. Changwei organic fertilizer production equipment design and R & D personnel first work is not in the office to work hard, but to do a lot of research in the market. For example, simple and fashionable organic fertilizer production equipment is the most popular consumer demand. In addition to unique skills, the equipment itself is also very small, can be operated in any environment, coupled with a simple operation process, organic fertilizer equipment is welcomed by enterprises of different sizes, becoming the highest sales in the industry, the most widely used equipment. Organic fertilizer production equipment needs the spirit of seeking truth from facts, integrating, combining high-tech achievements with actual market demand, improving the overall level of equipment, and complying with market demand, otherwise it will be eliminated by the market one day. As an enterprise, interests are always the pursuit, so for higher interests, faster development, will choose the best, most suitable for their own development of equipment, so if the organic fertilizer equipment can not bring benefits to customers, but the enterprise self-created self-thought can increase sales, that is contrary to the market.

The environmental protection era of organic fertilizer granulator is coming

In the agricultural era, people pay more attention to environmental protection, fashion, green and organic. Therefore, in terms of fertilizers, organic fertilizers are mostly used instead of granular fertilizers. There are also many manufacturers of organic fertilizer granulators. At present, it is a kind of environmental protection equipment that is supported by the whole country and even the world, and with the continuous increase and use of organic fertilizers, China has begun to phase out the production and use of chemical fertilizers and compound fertilizers. Organic fertilizer production line to accelerate the development of green organic agriculture, green organic agriculture generation and development of historical inevitability, human since the beginning of history, agricultural production has roughly experienced from primitive agriculture, traditional agriculture, petroleum agriculture to green organic agriculture development stage. Nowadays, the world's environmental protection, resource recovery and recycling are important topics in the 21st century. How to use advanced organic fertilizer equipment technology to convert the decomposing organic matter in the increasingly piled up mountains of garbage into treasure, and make efficient organic fertilizer back to nature for use to ensure the quality of human life has become a major problem we are currently facing. The advanced technology and method of converting American waste into efficient organic fertilizer with extremely high social and economic benefits. In short, the environmental protection era of organic fertilizer granulator has come, as people increasingly value the significance of environmental protection, the sales of organic fertilizer granulator equipment in China will continue to rise, which is the welfare of the society and the Gospel of the people. The spring of organic fertilizer granulator is just coming.

How to choose organic fertilizer granulator in chicken manure production line?

A complete set of granular organic fertilizer production line in the production of organic fertilizer choose granulator is also the main reason, some granulator production is round particles, some are columnar, some flat ball type, such as the production of particles can choose disc granulator, new organic fertilizer granulator, drum granulator, such as the production of columnar ring mold granulator, columnar extruder, Flat ball type choose to double roller press granulator. But all kinds of granulation equipment have advantages and disadvantages. According to raw materials, investment costs (drying does not dry), according to the needs of farmers, the choice of equipment is different. In a complete organic fertilizer production process, fermentation and granulation, grinding are the three most critical steps, so the fermentation pile turning machine and organic fertilizer granulator, organic fertilizer grinder in all the organic fertilizer equipment occupies an important role. Here we will discuss the problems that may be encountered in the production process in view of these two key links.

How to choose granulator in organic fertilizer production? You can refer to the following information: for example, the production of particles can choose disk granulator, new organic fertilizer granulator, drum granulator; Select ring mold granulator and column extruder for columnar production; Irregular, flat ball type is selected to roll extrusion granulator (according to the mold);

All kinds of granulation equipment have advantages and disadvantages. According to raw materials, investment costs (drying does not dry), according to the needs of farmers, the choice of equipment is different.

Equipment and application of organic fertilizer hydraulic compost turning machine

1. The power transmission device of the organic fertilizer equipment: the device is composed of a motor, a reducer, a sprocket, a bearing seat, a spindle, etc., which provides an important device for the power of the overturning drum.

2. Walking device: The device is composed of walking motor, transmission gear, transmission shaft, walking sprocket and so on.

3. Lifting device: The device is composed of a hoist, a coupling, a drive shaft, a bearing seat, etc.

4. Pile turning device: The device is composed of sprocket, support arm, pile turning drum, etc.

5. Transfer vehicle: The device is composed of a walking motor, transmission gear, drive shaft, walking wheel, etc., which provides a temporary carrier for the stacking machine to change the slot.

Organic fertilizer hydraulic compost turning machine Uses:

1. Organic fertilizer tank turning machine is suitable for livestock and poultry manure, sludge, sugar mill filter mud, slag cake meal and straw sawdust and other organic waste fermentation turning pile, widely used in organic fertilizer plant, compound fertilizer plant, sludge waste plant, garden and bisporus mushroom planting plant fermentation and decomposition and moisture removal operations.

2. Suitable for aerobic fermentation, can be used with solar fermentation chamber, fermentation tank and migration machine. It can be used with the mobile machine to realize the function of multiple slots in one machine.

The working process of organic fertilizer dryer

The role of organic fertilizer dryer is a lot, its operation is also very difficult, many people in the operation of organic fertilizer dryer will appear misunderstanding, which leads to the use of poor effect. When operating the organic fertilizer dryer, it is best to first understand the working principle of the organic fertilizer dryer, and then the correct operation.

Organic fertilizer dryer is a vital organic fertilizer equipment in organic fertilizer production line. The dryer is a problem of water vapor return to the material after the temperature of the system decreases in the same direction. In the drying process, the hot gas flow moves forward from the tail, fully contacts with the material, and makes full use of the heat transfer through heat conduction, convection, and radiation.

The heat energy is directly transferred to the material, so that the water of the material is continuously evaporated in the cylinder body, and the inlet air suction device will draw out a large amount of water and wet air to prevent secondary pollution caused by dust discharge; Through the internal spiral mixing, sweeping, sheet, promote the movement of materials, complete the whole drying process; Countercurrent conduction dehumidification avoids reducing repeated drying procedures.

The working range of the hydraulic compost turning machine

Hydraulic compost turning machine is suitable for aerobic fermentation of organic waste such as animal manure, sludge and waste, sugar filter mud, slag cake and straw sawdust, and can be used with solar fermentation coffers, fermentation tanks and moving machines. The operation of one machine and multiple slots can be realized by matching the main machine with the mobile machine. Widely used in organic fertilizer plant, compound fertilizer plant, sludge waste, garden and other industries of raw materials fermentation and maturation. The press trough type flipping machine is suitable for aerobic fermentation, and can be used with solar fermentation chamber, fermentation tank and migration machine. It can be used with the mobile machine to realize the function of multiple slots in one machine. The supporting fermentation tank can be used for continuous discharge or batch discharge. High efficiency, smooth operation, durable, turning uniform.

The organic fertilizer equipment has high efficiency, smooth operation, robustness and durability, and uniform casting. Equipped with limit stroke switch, guarantee and limit operation, centralized control of control cabinet, manual or automatic control function can be achieved. The pile turning machine is equipped with hydraulic lifting system, the rake teeth are durable, and it has certain function of breaking and mixing fermentation materials in the organic fertilizer production line.

Common guidelines for the principle of organic fertilizer rotary drum granulator

Rotary drum granulator product overview: Rotary drum granulator has beautiful appearance, simple operation, low energy consumption, long life, uniform drying, easy maintenance and other characteristics, belongs to the most advanced organic fertilizer equipment in China. The product is suitable for cold, hot granulation and mass production of high, medium and low concentration compound fertilizer.

Its main features are as follows:

1, less investment, quick effect, good economic benefits, reliable performance.

2, small power, no three waste emissions, stable operation, easy maintenance, reasonable process layout, advanced technology, low production cost.

3, high ball strength, good appearance quality, corrosion resistance, wear resistance, low energy consumption.

4, the cylinder is lined with special rubber plate or acid-resistant stainless steel liner, which realizes automatic scar removal and tumor removal, and cancels the traditional scraper device.

Working principle of rotary drum granulator:

The motor drives the belt and pulley, drives the drive shaft through the reducer, and works opposite to each other through the open gear mounted on the drive shaft and the big gear ring fixed on the body. The material is added from the feed end, the special structure inside the cylinder makes it into particles, and flows out through the discharge port. Due to the continuous entry of the material and the continuous rotation of the granulator, the mass production of the organic fertilizer production line can be realized.

The development of modern agriculture provides an opportunity for the advancement of organic fertilizer production equipment

At present, the rural development has been in the transition period, a large number of surplus labor in the countryside flow to the city, land circulation, towards large-scale intensive development, a lot of land has been contracted out to develop the tertiary industry. The acceleration of rural urbanization development has increased the rural machinery market and organic fertilizer equipment space, and more modern machinery and equipment will serve agriculture more. Compared with industry and service industry, the development of China's agriculture is slow and backward, and this phenomenon of uncoordinated synchronization has also been attached importance by the state. In some European and American countries are basically in the form of farms, basically achieve agricultural mechanization, thousands of acres of rural areas may only need a few people to plant, fertilization can be used to spray, irrigation has modern irrigation tools, "foreign fruit picking is mechanical, because the artificial is very expensive, all artificial fruit is generally expensive, The future of agricultural mechanization is highly functional mechanization." The organic fertilizer production line equipment involved in agriculture has great potential in the future, and China's agricultural efficiency cannot be improved without mechanization. All kinds of machinery, organic fertilizer equipment, processing enterprises into agriculture, it is best to be as a service company, rather than their own participation in farming this scale is just right, and there will be no environmental pollution. The centralized development of agriculture in the future will inevitably lead to the continuous progress and improvement of large machinery, and the continuous development of science and technology requires people to predict the future trend with an advanced vision, which is also what the managers of organic fertilizer equipment production enterprises should see. The realization of rural urbanization needs the support and support of the machinery industry, without modern organic fertilizer production equipment, planting equipment, agricultural product processing equipment, etc., the modernization of agriculture is out of the question. Opportunities and challenges coexist, the opportunity of the acceleration of the process of agricultural urbanization needs to be grasped by machinery and fertilizer production equipment enterprises, while many unpredictable changes in the future, but also need manufacturers to prepare for the rainy day, consolidate the foundation, in order to remain unchanged. The development of modern agriculture provides an opportunity for the advancement of organic fertilizer production equipment

The working principle and characteristics of rotary drum granulator

Working principle of rotary drum granulatorr:

The rotary drum granulator drives the belt and pulley by the main motor, drives the drive shaft through the reducer, and works opposite to each other through the open gear installed on the drive shaft and the big gear ring fixed on the body. The material is added from the feed end of the rotary drum granulator through the inside of the cylinder. Through the special structure inside the cylinder, it is made into particles, and finally outflow through the discharge port. Due to the continuous entry of materials and the continuous rotation of the rotary drum granulator, mass production of organic fertilizer production lines can be achieved.

Characteristics of rotary drum granulator:

1, rotary drum granulator less investment, fast effect, good economic benefits, reliable performance;

2, rotary drum granulator manufacturers, no waste emissions, stable operation, easy maintenance, reasonable process layout, advanced technology, rotary drum granulator quotation, low production cost of organic fertilizer equipment;

3, rotary drum granulator into high strength, good appearance quality, corrosion resistance, wear resistance, low energy consumption;

4, the cylinder is lined with special rubber plate or acid-resistant stainless steel lining plate, and the rotary drum granulator realizes automatic scar removal and tumor removal, eliminating the traditional device.

The main way to improve the output of disc granulator

Disc granulator (also known as ball plate, disc granulator), has the characteristics of simple structure, low cost, convenient maintenance, etc., then what are the ways to improve the output of organic fertilizer production line disc granulator?

1. According to the composition, fineness, viscosity, humidity, temperature and other characteristics of the powder, the water content of the powder is controlled at about 30-28%.

(1)The water content is too large, too many balls, the surface of the ball is very sticky, easy to block the screen surface;

(2)How to determine the volume of particle water in the production process of organic fertilizer equipment: the most simple and practical method - feel method: grab a ball from the disk granulator, the hand can be a ball, and the finger can be released. In this way, the particles are more, the yield is high, and it is not easy to plug the screen surface.

2. Strictly control the quality of various raw materials such as fertilizers in accordance with the formula of compound fertilizers.

(1)Raw material discharge, feed strictly prohibit the use of iron blocks, stones greater than 10mm, wood blocks greater than 10mm. The quality index of rice bran and rice sand is not much, which seriously affects the yield.

(2)The powder size used as a compound fertilizer is 70-90 mesh.

(3)Do a good job in technical training, improve the technical quality of workers and operational skills.

3. The working mechanism of the nozzle must be mastered when selecting the nozzle: according to the theory of fluid mechanics, it has been proved that the greater the pressure, the smaller the through hole, and the larger the droplet diffusion surface. Under the same pressure, the nozzle hole is small and the droplet density is small. The spray hole is large and the droplet density is large.

(1)The smaller (or larger) the feed droplet size, the lower (or higher) the yield.

(2)The denser (or thinner) the feed drop, the more (or less) the feed liquid, and the higher (or lower) the discharge volume.

(3)In general, B type spherical spiral or B1 type basic spiral nozzle is the best choice for disk feeder.

Good blade, uniform particle size beautiful, blade material must be 16m, the blade is divided into two before and after, there is no gap between the two blades.

The advantages of organic fertilizer equipment chain compost turning machine

With the rapid development of society, the chain compost turning machine slowly into people's lives, is gradually familiar with more and more people, it not only has excellent characteristics, and the service life is relatively long-term, so what are his advantages? Let's take a closer look at it.

The product characteristics and basic principle of the chain compost turning machine: The chain compost turning machine is suitable for the aerobic compost of organic chemical solid waste such as livestock excrement, silt and domestic waste treatment. The organic fertilizer equipment works on the slide rail of the fermentation tank, and its high efficiency is beneficial to accelerate the fermentation compost of the raw materials in the fermentation tank, reduce water and improve the quality of the compost. Product features Chain flat type flipping machine selected with chain transmission system, flipping support point of the plate structure, flipping friction resistance bar electric environmental protection and energy saving, suitable for shape groove work; The flip plate is equipped with soft tensioning and ductility damping system software to maintain the efficient operation of the transmission device and working components; The tilting plate is equipped with a replaceable wear-resistant bevel tooth cutter, which has a strong crushing ability and a very good oxygenation effect. When flipping, the raw material stays on the pallet for a long time, is scattered at a low level, has sufficient contact with the atmosphere, and is easy to rain; According to the vertical and vertical moving can complete the tank body random parts of flipping work, flexible maneuvering; The adjustment of the components in the flipping work is controlled by the hydraulic transmission system, and the stability is convenient in the soft work. Long distance remote control of the equipment forward, sideways, flipping and rapid backward work, improve the actual operation of the natural environment; Optional tank type raw material concrete distributor, automatic feeding equipment, solar power generation fermentation room and natural ventilation hydrolysis acidification pool system software; The configuration of shifting machine can complete the work of multiple slots of a flipping machine, saving the investment of organic fertilizer production line.

The operation and maintenance method of drum screener machine

Drum screener machine is an important part of organic fertilizer equipment, in recent years has been widely used in agriculture, let us understand the specific installation and debugging method of roller organic fertilizer screening machine.

The organic fertilizer screening device is inclined and mounted on the frame, the motor is connected to the drum device through the coupling through the reducer, and the drum screening machine is driven to rotate around the shaft. When the material enters the drum device, due to the tilt and rotation of the drum device, the material on the screen surface is turned over and rolled, so that the qualified material is discharged through the discharge port at the back end of the drum, and the unqualified material is discharged through the discharge port at the end of the drum.

Preparatory work before trial operation: 1. After installation and inspection of organic fertilizer screening machine, it can be put into trial operation of organic fertilizer production line. Before trial operation, it should be carefully checked whether the components are correctly installed as shown in the drawings, the fasteners are reliable, and there are obstacles to the operation of the drum screen around the screen body. 2. Open the rectangular overhaul door, and observe whether there is card friction in the comb screen mechanism by manually rotating the tray screen. If so, adjust the bolt. 3. Check whether the bearing seat and gearbox are well lubricated and whether the oil level of the gearbox is appropriate. 4. The power connector should be solid and reliable, well insulated, and properly grounded. Operation and maintenance of roller screening machine: 1. When driving, you must first open the cage drum screen, and then open the feeding equipment. 2. Three days before the boot, check the fasteners of the cage drum every day. If they are loose, they should be fastened in time. In the future, cage drum fasteners can be inspected and processed regularly (weekly or half a month). 3. The bearing seat and gearbox should be regularly checked for lubrication, and timely refueling and oil change. Large shaft bearings use No. 2 lithium grease, under normal circumstances, add grease every two months, the filling amount should not be too much, otherwise it is easy to lead to overheating of the bearing, should be cleaned once a year and checked once. 4. When the equipment is closed for a long time (more than 30 days), the insulation of the motor should be shaken to avoid burning the motor.

What is the market prospect of chicken manure organic fertilizer?

Chicken manure organic fertilizer is organic fertilizer production line equipment: dehydration, fermentation, grinding, screening, mixing, granulation, drying, coating and other processes made of organic fertilizer, if it is powdered organic fertilizer, you do not need organic fertilizer granulator. If you want to invest in chicken manure organic fertilizer processing plants or sell chicken manure organic fertilizer, you are more concerned about a problem - what is the market prospect of chicken manure organic fertilizer? Is it worth the investment? Chicken manure organic fertilizer market prospects are still good, the development potential is great, why say so? Read the following analysis to understand! The market prospect of chicken manure organic fertilizer has great potential for development, for the following reasons: 1. Promoting agriculture through science and technology is the fundamental road to agricultural development. Fertilizer is an important material basis for agricultural development. The heavy application of chemical fertilizer causes soil compaction and agricultural product quality degradation, and the utilization rate of fertilizer decreases. In the past 30 years, more and more agricultural experts and governments in the world have actively advocated reducing the use of chemical fertilizers, and more green fertilizers such as organic fertilizers and bio-organic compound fertilizers, and the rise of the "green revolution" of fertilizers, that is, the concept of green environmental protection. 2. The large amount of fertilizer application, resulting in soil compaction and agricultural product quality degradation, in order to improve this situation, the state launched the "organic fertilizer instead of fertilizer" subsidy amount support policy, and vigorously promote, encourage everyone to apply organic fertilizer, promote the implementation of the implementation, colleagues promote the rapid development of organic fertilizer equipment industry. 3. The large use of chicken manure organic fertilizer, on the one hand to protect the soil fertility, to achieve permanent fertility, crops, plants, etc. can supplement their needs of organic matter, to achieve strong roots, improve the yield of the role. On the other hand, an agricultural circular economy without waste discharge has been formed, which protects the safety of the rural environment. From the above point of view, chicken manure organic fertilizer is worth investment, is a good project.