| 摘要 |
<p>Hand held map for determining the direction of Mecca, has angularly true world map with Mecca as its centre point. A rotating pointer (B, C) is mounted at the centre point, while a compass needle (A) is secured at its representative north pole. The rear part of the pointer has a transparent section or has a section removed. It also has a central marking or markings to permit aligning of the central axis of the pointer with a location on the map.</p> |
