In the engineering survey in current electric power, several kinds of coordinate system and elevation in common use and their mutual matrixing relation are introduced.

本文介绍当前电力工程测量中常用坐标和高程及其相互换算。

Through an example,a new method and its steps of common difference matrixing of linear dimension are introduced.

过一个实例,介绍了线性尺寸公差换算一新方法及步骤。