The development of the ear. In order to solve the problem of corn abundance and lack of grain, and increase corn yield, in addition to a variety of measures such as planting excellent varieties, rational close planting, and controlling pests and diseases, the focus is on soil, fertilizer and water.
(1) Improve soil and enhance soil water retention and fertilizer retention capacity. Advocate the application of organic fertilizer and deep ploughing and cultivating techniques to improve the soil structure, promote the growth and development of corn, and enhance its resistance to adverse external environment.
(2) Rational fertilization. It is necessary to increase the application of organic fertilizer and rationally apply nitrogen, phosphorus and potassium fertilizers; boron is one of the essential trace elements of crops, and it plays an important role in the development of reproductive organs. Therefore, foliar spray or multi-micro-fertilizer has a good preventive effect.
(3) Water supply. It is necessary to prevent drought and damage. After the jointing of the corn, the reproductive organs are vigorously developed, and the water supply should be timely and appropriate to promote the development of the male and female ears.
Piston Seals and Rod Seals are important seals used in mechanical equipment. Their main function is to prevent liquid and gas leaks and ensure the normal operation of mechanical equipment. Piston seals and rod seals are usually used in hydraulic and Pressure system, such as hydraulic cylinders and Pneumatic cylinder. The quality and performance of these seals directly affect the efficiency and lifespan of mechanical equipment.
The classification of piston seals and rod seals is mainly based on their material and design structure. According to the different materials, they can be divided into rubber seals, polyurethane seals, polytetrafluoroethylene seals, metal seals, etc. According to the different design structures, they can be divided into unidirectional seals, bidirectional seals, rotary seals, etc.
Rubber seals are a common type of seal, and their main material is rubber. Rubber seals have good sealing performance and wear resistance, and are suitable for medium and low pressure hydraulic systems and Pressure system. Polyurethane sealing element is a high-performance sealing element, and its main material is polyurethane. Polyurethane seals have high wear resistance, high temperature performance and high pressure performance, and are suitable for high-pressure hydraulic systems and Pressure system. PTFE sealing element is a corrosion-resistant sealing element, and its main material is PTFE. PTFE seals have excellent corrosion resistance and high temperature resistance, making them suitable for fields such as chemical and food processing. Metal seals are a type of high-temperature and high-pressure seal, mainly made of metal. Metal seals have high temperature and high pressure performance and corrosion resistance, and are suitable for high temperature and high pressure hydraulic systems and Pressure system.
Unidirectional seals and bidirectional seals are classified based on different sealing directions. A unidirectional seal can only prevent the leakage of liquid or gas from one direction, while a bidirectional seal can prevent the leakage of liquid or gas from both directions. Rotating seal is a type of seal that can rotate and is mainly used for sealing rotating shafts. Rotary seals are divided into unidirectional rotary seals and bidirectional rotary seals.
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