20 ' inch roof turbine ventilator

bearing from USA. All the parts of the turbine ventilators are finished by the

professional molding tools, they are assembled after checking by the

professional equipments. It works without the electricity power, they can

change our air condition indoors, leave us a comfortable environment.

Also, when used in a workshop or a storeroom, they can advance the

working environment, and this improves the workers' efficiency.