Shanghai Gaohang Hydraulic and Pneumatic Assembly General Factory is one of the leading enterprises in manufacturing hydraulic components, which has been assigned by the Ministry of Machinery Industries and the Ministry of Metallurgical Industry. It has been in production for more than thirty years, and has been selected as the national major development industry by the Ministry of Machinery Industries and the State Plan Council in 1995. The factory occupies areas of 20,000m² in which 13,000 m² are floor spaces. Among the rest, of the space consists of there is a four-floor building. Each floor has 500 m² with an air condition for center controlling and 100,000 degrees of purification for production of filter elements. It has various processing equipments of 257 and 21 testing rigs. It is fixed assets are to the home of RMB 14,50 million. The factory employs 570 people and staff members 26 of which are engineering personal. The technique center has adopted the CAD auxiliary design. In March, 2002, the factory passed the International Standard ISO9001 (2000 edition) our works is to whole-heartily serve the customers and provide the highest quality products for our customers. We execute the quality polity policy for "Selected finely, Manufactured precisely, Quality excellent, and Served whole heartily". In 1996, the factory was checked for the "Certificate of measuring unit". The factory specializes in manufacturing various oil filters, filters, filter sets, Three-type hydraulic pressure valves, YZ-series pump units, coolers, accumulators etc. The factory has foot various the products for science technologies, the state, and military all of which won high praise by the customers. The products have been used in construction machinery, machine tools, metallurgical machines, mineral machines, chemical machines, cranes, plastic machinery and nuclear electric generator. The annual output was 30,000 pieces of hydraulic elements per year.