... WIDE USED LEADING LEVEL 1. Low noise, due to the helical suction and discharge, the blower air flow in and out according to ... blower sealing structure is reasonable, oil can not enter the chassis, thus the air is very clean.8. Low price: As we have ... treatment, aquaculture, pneumatic transport, vacuum packing, oxygen generation, etc. 14.Oil tank: after milling they are all polished by digital grinding ...