Many parts of machine product all involve finish machining of holes.

对机械产品的多种零件均涉及孔的精加工。

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In this process, there are much rough machining but less deep and finish machining.

在制作上粗加工多，深加工、精加工少。

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In this process, there are much rough machining but less deep and finish machining.

在制作上粗加工多，深加工、精加工少。

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