* QZA Series Axial Fan is a novel aerofoil fan self-deseloped and manu-factured by our factory. It has the feat-ures such as high pressure coefficient, large discharge factor, smooth performance curve, com-pact structure, easy inst-allation etc. It is applicable for the ventilating and scavenging occasions such as industrial and mining enterprises,gue-sthouse, restauran七warehouse, Cinema, gymnasium and so on.