在孔群加工中，总加工成本由刀具成本、加工成本、非加工刀具行进时间、刀具换刀成本组成。
In holes machining, the total machining costs include tool cost, machining cost, un-tool traveling time and switching tool cost.
在孔群加工中，总加工成本由刀具成本、加工成本、非加工刀具行进时间、刀具换刀成本组成。
In holes machining, the total machining costs include tool cost, machining cost, un-tool traveling time and switching tool cost.
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