The Introduction ofaxial-flow blower The centrigual ventilator outer covering and the impeller use the anti-corrosive FRP material, all internal parts in the air blower through the antiseptic treatment; it can transport acid, alkali and so on caustic gases. The air blower's efficiency is high, the wind pressure is big, and the noise is low. It also can use long distance pipeline to transfer gas, and may according to the request make steeliness ventilator.