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　　In recent years, the state of the hydraulic, pneumatic seals industry technology introduction, technological innovation, scientific research and development, has given some support, and promote the rapid development of the industry. The development of agriculture, water conservancy, energy, transportation and other industries in China is developing rapidly. Therefore, a large number of mechanical equipment is needed to meet the needs of its development. With the increase in the level of industrialization and automation, these equipments need to support a large number of high performance and high reliability of hydraulic pneumatic and sealing components.
　　Status of the industry is optimistic sealing industry structure, the formation of the state-owned enterprises, private enterprises, foreign-funded three legged tripod situation, the output value of each accounted for one-third. State-owned enterprises are to increase the dynamics of reform; the rapid rise of a large number of private enterprises; large amounts of foreign capital to enter, the world famous companies in the basic in China carry out joint venture, sole proprietorship, sales and other business, showing a trend of the transfer of manufacturing to China. At the technical level, state-owned enterprises leading products is in the 1980s introduction and independent development, the basic is the intermediate level; private enterprises are mostly middle and low product dominated, but the accumulation of funds quickly, using existing technology, talent gathered rich experience, level of technological progress is fast, its product quality, variety and services continue to improve in the competition; foreign enterprises in the high-end products mainly technology level and abroad, is a domestic joint venture, wholly foreign-owned enterprise required high-end host and key projects supporting.
　　With the rapid development of China's economy, all kinds of machinery and equipment used in the hydraulic, pneumatic and control the transmission and control of the growing, the technology requirements of the seal is increasingly improved. China's fluid power products market is developing rapidly, in addition to the United States, Europe, Japan, the first in developing countries. China's imports are also increasing, and the market has great potential for development.
　　With the development of industrialization and the level of automation, mechanical equipment needs a lot of high performance and high reliability of hydraulic pneumatic and sealing parts. In addition to the Three Gorges of the Yangtze River, South North Water Transfer, the natural gas from the west to the East, West East electricity transmission project, the Qinghai Tibet Railway century engineering construction and a large number of large coal mines, oil, iron open-pit mines, power stations, airports, ports, railway, high grade highway projects, and a large number of urban construction and housing construction. Therefore, loading and unloading earthwork workload continues to increase, and consolidation of logistics modernization development, and new technology, new technology and new materials application will make domestic engineering machinery demand for the long term, to maintain the growth momentum. In a word, the products need a lot of high-pressure plunger pump, high pressure gear pump, big torque motor, wheel motors, multi way valve, an oil cylinder, pipe fittings, pipe and oil filter, mechanical engineering support and maintenance with the hydraulic pressure and the seal pieces of the market will face a new period of development. Which the construction machinery is the user of hydraulic products, accounting for 42.3% of the industry's sales, the future will expand the proportion of the future, so the development trend of engineering machinery is very important. In another development, the annual domestic enterprises in the production of excavators, road machinery, cement mixing truck supporting the import of hydraulic pieces, approximately $1.5 billion above. In short, for the construction machinery, maintenance of hydraulic and sealing parts of the market will face a new era of big development.