本文叙述了焦度计的误差，顶焦度标准镜片内表面弯度的选择原则，以及标准镜片的测量方法等。

This paper describes the error in focimeters, the principle of selection on curvature of inside face for vertex power of standard lenses and the method for measuring them.

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描述了一等标准金属量器的结构设计原则，所建标准的特点与容量标定方法、误差分析等。

This paper deals with the structural design principle, the technical features, the method of verification as well as the error analysis of the first class national standard metal capacity system.

youdao

描述了一等标准金属量器的结构设计原则，所建标准的特点与容量标定方法、误差分析等。

This paper deals with the structural design principle, the technical features, the method of verification as well as the error analysis of the first class national standard metal capacity system.

youdao