| 摘要 |
<p>The holding aid is of a horseshoe shape with a transversal rear element (1) joined with hinges (2). Four u-shaped projections (3) can be used for attaching stands. Pins can be guided through conical holes (5) arranged in a row along the front in order to prevent the impression from an unwanted rotation. Rubber bands can be held at mushroom-shaped projections (4). The two halves of the device are joined with a screw (6) at the front.</p> |
