... as demand)Motor bearing, national grade. V-belt, A -type belt, imported from Korea. Shutters, galvanized board, ... , They assure the quality of the fan. Big belt pulley (push-pull centrifugal fan): it used ... with updated design for automatic regulating device, the belt doesn’t need manual adjustment. Chinese motor , ... the whole machine runs the rails. V-belt, A -type belt, imported from Korea.Blades : The ...