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河北天择重型机械有限公司专业生产齿轮减速机,ZDY、ZDZ硬齿面中硬齿面圆柱齿轮减速机JB/T8853-2001
Hebei Tianze heavy machinery Co., Ltd. specializes in the production of gear reducer,ZDY, ZDZ hard tooth surface in hard tooth surface cylindrical gear reducer JB/T8853-2001