Longtech machinery Industry Co., Ltd. is a professional manufacturer of Roots Blower and Vacuum Pump facility. For many years, Longtech has been reputable and popular in the market based on our excellent quality and satisfactory perfect after-service. We have invested in research, development and improvement on all our products, including Roots Blower, Vertical Blowers, Submersible Blowers, Bubble diffuser, ext.. Main Product: electrical product supply ( supplies)- (1) roots blower & accessory ( accessories)- industrial blower, industrial blowers, LTV & LT type roots blowers, discharge silencer, safety & check valves, T joints, flexible joints, tube connectors, suction filter tanks, high pressure blower, high pressure blowers. (2) hard enduring diffusers, high-perform ncefine-bubble air diffuser tubes, hard enduring fine bubble diffusers, environmental protection diffusers. (3) suction fixing, printing press paper feed system, vacuum pumps, bubble diffusers, fixed bio film medium.