The main commercial vehicle power steering, mechanical steering device 230000 sets / year; the drive shaft 500000 / year The drive shaft 9 holes, 20 basic types, more than 1000 varieties, can satisfy the quality of vehicle and equipment from 3.5 tons to 40 tons (bearing torque of 1000NM to 24000NM) vehicle requirements. In addition to a front transmission, also contains the bridge between the drive shaft 3 series, 4 series of maintenance-free drive shaft