production time per piece
... 单纯计件工资制 straight piece-work system 单件工时 production time per piece 单位产品必要的劳动消耗量 unit manpower needs ...
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实际单件工时 actual tact time
·2,447,543篇论文数据，部分数据来源于NoteExpress
通过对钻孔加工族的时间研究，初步建立不同工步单件加工时间的标准资料，并探讨节省作业转换时间的方法。
By studying some boring machining families, standard time datum for unit operation was set up. Some methods of shortening operation changing time were also presented.
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