【正文】 er improve the level of technology, technique and equipment to be greatly improved. In order to form a higher starting point, specialization, and run production has laid a 3 good foundation. In recent years, many countries in the development of mon ownership guidelines, under different ownership SMEs rapid rise showing great vitality. With the further opening up, threefunded enterprises rapid development of industry standards for improving and expanding exports play an important role. Today, China has and the United States, Japan, Germany and other countries famous manufacturers joint ventures or whollyowned by foreign manufacturers to establish a piston pump / motor, plaary reduction gears, steering gear, hydraulic control valve, hydraulic system, hydrostatic transmission, hydraulic Casting. pneumatic control valve, cylinder, gas processing triple pieces, mechanical seals, rubber and seal products more than 50 production enterprises, attracting foreign investment over 200 million . dollars. Second, the current situation (1) Basic Profiles After 40 years of efforts, China hydraulic, pneumatic and sealing industry has formed a relatively plete categories. a certain level of technical capacity and the industrial system. According to the 1995 Third National Industrial Census statistics, hydraulic, Pneumatic seals and industrial 370,000 annual sales ine of 100 million yuan in stateowned, villagerun, private and cooperative enterprises, individual, three capital enterprises with a total of more than 1,300, of which about 700 hydraulic, Pneumatic seals and the approximately 300 thousand. By 1996 with the international trade statistics, the total output value of China39。 1 Hydraulic Station and the development of hydraulic ponents Profiles Hydraulic Pump Station also known as the stations are independent h ydraulic device. It requested by the oil gradually. And controlling the hydraulic oil flow direction, pressure and flow rate, applied to the mainframe and hy draulic devices separability of hydraulic machinery. Users will be provided after the purchase hydraulic station and host of implementing agencies (motor oil or fuel tanks) connected with tubing, Hydraulic machinery can be realized from these movements and the work cycle. Hydraulic pump station is installed, Manifold or valve bination, t anks, a bination of electrical boxes. Functional ponents : Pump device is equipped with motors and pumps, hydraulic station is the source of power. to mechanical energy into hydraulic oil pressure can be. Manifold from hydraulic valve body and channel assembled. Right direction for implementation of hydraulic oil, pressure and flow control. Valve portfolio plate valve is installed in up board after board conn ects with the same functional IC. Tank plate welding semiclosed containers, also loaded with oil filtering work, air filters, used oil, oil filters and cooling. Electrical boxes at the two patterns. A set of external fuse terminal plate。s industry hydraulic billion yuan, accounting for the world39。 aerodynamic pieces of the total demand of about 5 million, with sales more than 700 million yuan。 它按逐級要求供油。 油箱－－板焊的半封閉容器，上還裝有濾油網、空氣濾清器等，用來儲油、油的冷卻及過濾。 1968 年中國液壓元件年產量已接近 20 萬件； 1973 年在機床、農機、工程機械等行業(yè)，生產液壓件的專業(yè)廠已發(fā)展到 100 余家，年產量超過 100 萬件，一個獨立的液壓件制造業(yè)已初步形成。近年來，行業(yè)加大了技術改造力度， 1991~1998 年國家、地方和企業(yè)自籌資金總投入共約 20 多億元，其中液壓 16 億多元。 (2)當前供需概況