1.Explosion-proof exhaust fan/axial flow fan/ventilating fan 2.Easy to install and durable. 3.Excellent ventilation ... refining, petroleum exploitation, offshore platform, tankers, pharmaceutical, military industry and other dangerous place for ventilation, exhaust, cooling purposes. ... , vane, metal frame and shutters, etc.2. Wiring with steel tube or cable. Main technical parameters TypeVoltage (V ...