high pressure air blower 1)Centrifugal system 2)high quality,low noise 3)High efficiency,energy saving 4) CE/ISO certificate ... , axial ventilation fan,ventilator, external rotor axial fan,high pressure air blowerWe are a professional manager for more than 30 ... lasting and high efficiency. The stainless steel kinds are waterproof and dustproof effects.By pumping the air with negative pressure, the fan ...