To correctly implement NC machining, it is necessary to grasp the meaning of these points. Therefore, these key points are analyzed and compared with each other in this paper.

数控加工中有许多“点”，如机床原点、机床参考点与工件原点等，理解和掌握这些“点”是正确进行数控加工的基础，因此，本文对数控加工中这些关键的“点”进行了分析和比较。

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She is a nobody, a casual extra, except that, when they grasp each other en passant, and as take follows take, she becomes, imperceptibly, a somebody.

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