... -Ningbo Expressway, with veryconvenient transportation. At present, Our enterprise mainly produces Centrifugal fan and blower, external rotor axial fan,ventilation fan, Duct fan, shaded pole motor, external rotor fan motor,aluminum die casting ... efficiency: our fan adopted the specical design to keep the best banlance betwwen Air flow and Noise. 2.1 Specifcation 230V 2.2 ...