In this paper the basic concepts of the robustness of plane dimension chain is put forward on the basis of engineering robust design principle.

基于稳健设计和稳健优化设计原理，提出了平面尺寸链稳健性基本概念。

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The principle, procedures and a calculating example of the analytic method of calculating location errors based on the plane dimension chain principle are introduced.

平面尺寸链在工艺尺寸计算中是一个重要环节 ，介绍了一种平面尺寸链在计算时将其转化为直线尺寸链 ，然后按照全微分法进行计算的方法。

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