4-72 PP, PVC agaist explosion proof centrifugal blower, used PVC Or PP plate, the process thermo-compression processing, the welding develop manufacture becomes. The air blower is medium the low pass air blower class, has the high efficiency, consumes electricity, anti-corrosive, attractive appearance, low noise, fastness industry. Measuring appliance, falvanization, chemical fiber spinning. And weaving, Medicine, scientific research, enviromental protection, hotel, public place taking a breath well ventilated. Removes includes acid, alkali, and virulent noxious gas essential equipment.