... and static balance, ensures generation of a lot of air volume at the ... rear of fan, which is easy and convenient for installation and removel.8.Fan is ... test prior to shipment.9.High quality motor, whose voltage can be 380V or 220V ... industrial fields, civil fields & agricultural fields,such as mines, textile workshops, warehouses, stores, supermarkets, ... Poultry/Agriculture Shutter Cooling Fan with CE