Early machine tools were operated by craftsmen who decided many variables such as speeds, feeds, and depth of cut, etc.

老式机床通常是由工人操作并由他们决定机床速度、进给量、切削深度等。

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Early machine tools were operated by craftsmen who decided many variables such as speeds, feeds, and depth of cut, etc.

老式机床通常是由工人操作并由他们决定机床速度、进给量、切削深度等。

youdao