... Acid& Alkai Resistan Explosive-proof flexible ductanti-static ventilation duct, air duct, anti-static flexible ductflexible duct:/air duct/exhaust ... : enduring high temparature,acid,alkali,oleic acid, harmful liquid state gas ect. the duct body is without any ... ship building or welding, laboratory , engine room ,the municipal conduit engineering,fire-fighting to ventilate or exhaust waste air,dust ...