The geomagnetic field varies continuously .地磁场不断地发生变化。On advertisement: The day is geomagnetic, can you treat heart disease really?广告上的: 天地磁, 真的能治疗心脏病?The data of international geomagnetic reference field are widely used...
The geomagnetic field varies continuously .地磁场不断地发生变化。Electric compass is a sensor used to determine direction with the help of geomagnetic field.电子罗盘是一种利用地磁场来测量方位的传感器.The geomagnetic field varies continuously.地磁场不断地发生变化...