... *Be used for ventilation and air the laboratory T35 axial fan types: according to impeller diametar,could divided to NO.2 ... , 5, 5.6, 6.3, 7.1, 8, 9, 10, 11.2 and so on .Widly using for industrial factory ,machinery ... .office block,movie theater .so on Explosion proof Axial Flow Fan Type BT35-11Application1,Designed forExplosive atmosphere Zone 1, Zone 22 ...