制造业为了计算制造费用，而设定的一个参数，是各受益对象所消耗的机器工作时间，可以是实际工时，也可以是定额工时。
标准生产能力通常表达为机器工时、直接人工成本、直接人工工时等指标。
The productive capacity is usually expressed in terms of an activity base, such as machine hours, direct labor cost, or direct labor hours.
在一台机器上使用数种刀具来顺次或同时进行几项机器操作，将节省大量加工时间。
It will save considerable machining time to use more than one tool in one machine to perform several machine operations either in sequence or simultaneously.
机器开始以最大速度运行来减少非加工时间，但当他达到数据定义的位置时，机器开始减速。
The machine moves initially at maximum velocity in order to reduce nonproductive time but decelerates as the tool reaches its numerically defined position.
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