Screw Compressor, Air Compressor, High Pressure Air Compressor manufacturer / supplier in China, offering High-Efficiency 37kw Oil Screw Vacuum Pump for Industrial Applications, High-Efficiency 40HP 1800m3/H Oil Screw Vacuum Pump for Industrial Applications, High-Efficiency 30kw 1800m3/H 0.35mbar Oil Screw Vacuum Pump for Industrial Applications and so on.