Cycle Time and Lead Time 周期和生产准备时间
At the same time the joint drill wear also easily lead to shortening the life cycle of drilling and even early retirement.
同时由于钻具接头超磨，也容易造成钻具使用周期缩短甚至提前报废。
In order to capture a bigger market, a company needs to shorten the product manufacturing cycle and product development lead time.
为了得到更大的市场，公司必须做到以下两点：一是缩短产品生产周期；二是缩短产品开发周期。
The reflection of thin layer may lead to frequency notch and the reciprocal of notch cycle is equal to the time thickness of thin layer.
薄层反射在频率域会出现陷频现象，其陷频周期的倒数等于薄层的时间厚度。
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