看了贵刊81年第5期上刊登的,安静源同志所写《误差理论在间接测量中的应用》一文(以下简称《误差》),其中有些理论与实践问题值得探讨。《误差》一文的第三节图7例的解是不对的。确实该量具样板在加工完毕后,圆弧中心便与量具样板分离,不能再次复现圆弧中心O,因此测量半径R与夹角α的准确值难以进行。但图7中圆心分离后的二定点A、B,仅能建立一个独立的代数方程式。而被测的尺寸 After reading the article “Application of Error Theory in Indirect Measurement” published by No. 5 in August, 1999, some of the theoretical and practical issues worthy of discussion are published in No. 81, Section 3 of the “Error” article is not correct in the example of Figure 7. Indeed, after the processing of the measuring prototype, the center of the arc is separated from the measuring model, and the arc center O can not be repeated again. Therefore, it is difficult to accurately measure the radius R and the angle α. However, the two fixed points A and B separated in the center of the circle in Figure 7 can only establish an independent algebraic equation. The measured size