... fan 1.High efficiency,Easy to operate,Low noise, 2.Used in furnance ,boiler,and forced ventilation 3.ISO&CE BOILER CENTRIFUGAL ... latheNC =numerical control.NC cutter machine.straddle truck. Or double column type truck.dynamic balancing machine.VSR=vibratory stress ... generally consist of the following product parts:case, impeller, air inlet, motor, system integral pedestal, main shaft, driving system ( ...