machine tools--speeds and feeds
机床——速度和进给
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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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