Shanghai Gairs Machinery Co., Ltd.  It is a joint-stock enterprise specializing in R&D and manufacturing of general machinery, which integrates science, industry and trade. The company has a registered capital of 67.8 million yuan, covers an area of 68,000 square meters, and has a factory building area of 50,000 M2. It is located in Shanghai Songjiang Industrial Zone, an international metropolis. It is the pioneer enterprise in the development of single-screw air compressors in China, and generally uses single-screw air compression for fuel injection. Machine drafting unit of the national industry standard, the main drafting unit of the industry standard for "spray single screw air compressor for general use", the production/export base of single screw air compressor determined by the "11th Five-Year Plan" of the national compressor industry, China Vice President of General Machinery Industry Association, Vice Chairman of Compressor Branch of China General Machinery Industry Association, Member of National Compressor Standardization Technical Committee, National Contract-honoring and Credit-Reliable Enterprise, China Machinery Top 500 Unit; “Jia Lishi GAIRS” was awarded The Ministry of Commerce “the most competitive brand in 2006”; the Jialishi water-lubricated oil-free single-screw air compressor was certified by TÜV Rheinland.