... . 1. Features to further Pulleys,Belt Pulleys & Sheaves: 1) Sorts of pulley:V-Belt Pulley,Round Belt Pulley,Flat Belt Pulley,Timing Pulley, Transmission Pulley ... .The sorts of the machining parts/machinery parts:Pulley,Belt pulley,Synchronous belt pulley;Sheave;Gear,Ring gear;Sprocket,Motorcycle sprocket;Flywheel ...