... Be used for ventilation and air the laboratory T35 axial fan types: according to impeller diametar,could divided to NO. ... block,movie theater .so on Explosion proof Axial Flow Fan Type BT35-11Application1,Designed forExplosive atmosphere Zone 1, Zone 22 ... for sites with explosive atmosphere, such as petroleum exploitation, refinery, storage, chemistry, medicine, military facilities, etc.4,Be used for ...