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Shatter : High Strenth hot-galvanized steel sheet,with a centrifugal system it will turn on automaticaly.shutter will turn on off and seal under the infulentce of the gravity of springs when the ventilation equipment go off , which can effectively prevent and pribibit the ray outside from shining trought and make the in door air ventilation optimized.
Frame: Galvanized steel sheet , the zinc coat is 275g/m2 and the frame is one-time molded
Fan Blade: Germany-imported mirror finished stainless steel blades, the fan translations all have passed the experiment of homeostasis , which makes the air volume keep the same as the every beginning during the operation life span of the fan.
belt pulley : The V type belt pulley is aluminum magnessium alloy injection moulded, so it is light and high-strenth.
Belt : the belt is imported from Japan ,it is a ametabolic in a longtime so there is no use to maintain it during its life circle.
Free maintenance :there is no use to maintain it druing its life circle
36 inch fan
50 inch box fan