Changzhou Zhongke GearboxesCo.,Ltd is a comreheensive devotes totechnology,design angdevelopment, produce andelectrome-chanical operation mainly products are ZLYJ andZSYJseries、ZKG high torque series for single screw extruder ,SZ series for conical Twin-screw extruder ,special gearboxes for rubber machinery ,andR/F/S/K series worm speed reducer.