Truck Gear ISO:2000/TS16949 certification Best quality Gear manufacture in China. Just produce genuine gear,shafts. Truck GearISO:2000/TS16949 certification Best quality Gear manufacture in China. Just produce genuine gear,shafts.1. Heat treament:carburizing and quenching2. Surface disposal:forced shot-peening3. Advantage:introduced the high technology from American and produce the first rank- ...