圆周等分(或不等分分布)的位置度误差标注大致有四种:有基准的纯圆周等分均布;指定起始基准的圆周等分均布;两孔组重叠,其中一孔组的理想位置为另一孔组的定位基准;无基准的圆周等分均布。本文将在介绍测量方法的基础上探讨其测量结果的处理。 There are four kinds of position error annotation in the circumferentially equally distributed (or unequally distributed) positions: there is a pure circle equidistantly distributed on the basis of a reference, a uniform equilateral circle is assigned to the starting reference, the two hole groups overlap, and one hole group The ideal location for another hole group positioning benchmark; no reference to the circumference of a uniform cloth. This article will introduce the measurement method based on the discussion of the measurement results.