... plants, laboratory,PCB,environmental protection equipment,contains corrosive gas placesConveying gases that are not allowed to include ... , laboratory, PCB, environmental protection equipment, contains corrosive gas places, etc. GF4-72 type FRP explosion-proof ... styrene, toluene, xylene, carbon monoxide, acetic acid, kerosene, gasoline, furan, other inflammable gases and explosive gas. Model No.Power(Kw) ...