求翻译：本设计主要介绍了机床夹具的发展背景和在机械加工中的作用，托架斜孔分度钻模的设计过程。设计过程主要包括定位方案的选取，导向方案中钻套参数的设定，夹紧机构的选择，采用分度方案的原因及夹具体的选择；斜孔钻模上工艺孔的设置及计算；夹具总图上尺寸，公差及技术要求的标注；工件的加工精度分析。是什么意思？

This design introduces the development background of the machine tool fixture and machining bracket oblique hole indexing jig design process. Design process including the selection of the orientation program, drill sets of parameters of the set-oriented program, the clamping mechanism of choice, rea

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