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        Shanghai Shengyi Compressor is a 19 years experience manufacturer,which founded in 1999, specializing in the R&D, production and sales of industrial air compressors and air purifying equipment, include fix speed type, variable frequency type, oil free type, high pressure type, diesel portable type, marine type screw compressor and air dryer, precision air filter.Through our independent research and development, Shengyi produced screw compressors’ air flow capacity and operating stability are su...