Paleomagnetic measurements demonstrate that the Jijiagou section which is the stratotype one of Baode Stage of the Neogene in China records 12 normal and 11 reversed polarity zones.

古地磁表明,系保德阶界线层型,山西保德冀家沟剖面记录了12正极性段与11负极性段。

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常用的几种坐标系和高程系及其相互换算关系。