Zhejiang Zhuerna Machinery Co., Ltd. was invested by parent company Sino-foreign Pingyang Shiyi Variable Machinery Industry Co., Ltd. The company is established to meet demands for standard gearbox from OEM customers. Quantiy Control System: ISO9001:2008 Our main products: planetary gearbox, heavy-duty industry gear unit, R helical gear motor, S helical-worm gear motor, F parallel-shaft gear motor, K helical-bevel gear motor, and other OEM & ODM gear boxes. Main pr...