... .ISO9001:2000 System 2.Ten Years Experience of manufacturing ZL Series speed reducergearboxZibo City Boshan Wanxin Speed Reducer Co., Ltd. is ... -L, and NGW-S planet gear speed reducers; B and X series of cycloidal planetary gear speed reducers; ZQ, ZD, ZL, ZS ... electric drive drums. Recently, S, K, R, F, and T series of modular reducers have come into operation in our company ...