... of motor , swing mechinism ,fly, screen cover, wall type, floor type support frame, the fly has been formed by aluminum , ... 25-4155140068FT-757500.25-4170140075FR-757500.25-4170140075Remark:this one type has the best quality galvanoplastics guard net , oscilation angle ... . cast iron motor shell , special structure that deifferent from general type. has best quality cast al.gear box in the inner ...