Also, nc: ConveyanceType already has most of the properties I need, such as serial number and description.

同样，nc： ConveyanceType已经具有我需要的大多数属性，比如序列号和描述。

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The method and course of Non-Linear Process Planning(NLPP) used in STEP-NC was introduced, and the method of validating the sequence of machining working steps was also studied.

介绍了STEP-NC应用环境下计算机辅助工艺设计系统的非线性工艺设计的方法和过程，以及如何进行工步序列的有效化。

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The basic principle and method of time series analysis and its application in thermal error modeling on NC machine tools were presented.

提出了采用时间序列分析法进行机床热误差建模的基本原理及方法，及其在数控机床热误差补偿建模中的应用。

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