| 摘要 |
<p>An ideal compass in which two pairs of magnets different from each other in the magnitude of magnetic force are respectively employed for pointer to indicate the azimuth and azimuth searching, whereby earth's relatively weak magnetic force is sensed by the strong magnets, and the weak magnets are allowed to react to the strong magnetic force of the strong magnets. Thus, pointer indicating the azimuth which is connected to the weak magnets can be easily turned so as to accurately and stably indicate an azimuth.</p> |
