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.

本文当前电力量中常用的几种坐标和高及其相互换算关。

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

通过一个实,了线性尺寸公差换算的一种新方法及步骤。