实际应用结果说明了辅助指令在编程中的使用好坏，对保证零件的加工质量和精度有着积极的现实意义。
The result on actual application shows that the application of auxiliary instruction in programming plays an important role in guaranteeing the quality and precision of spare parts processing.
针对中心孔质量对零件加工质量的影响进行了分析，提出了几种保证中心孔质量的方法。
Some methods are put forward to assure the quality of center hole through the analysis of center hole's effect on finishing quality.
定位是机械加工和零件装配中的常用手段，而定位精度是保证加工质量和装配质量的重要指标。
Orientation is the common way in the mechanical machining and part assembling, and the orientation precision is the important target for ensuring the qualities of machining and assembling.
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