1.External rotor portable axial fan is used for welding factory exhaustion,communication cable maintenance,ship building,underground mine and so on.

2.The principle of operation is the same as the ordinary axial fan,but more larger volume and higher pressure with the advantages of small vessels ,low noise,light weight,high efficiency and mobile portability.

3.Can  make the distance or deep pumping operation area of wind when with telescopic type ventilation hose.