| 摘要 |
<p>The unit (1) has adjusting elements (4, 5) adjustable between a retracted pre-position and an extended fixing position. A magnet (6) i.e. two-pole magnet, is arranged in an inner partial housing (2) for retracting and extending the adjusting elements. The magnet is adjustable from outside of the partial housing between the retracted pre-position and an extended fixing position of the adjusting elements. The magnet generates static magnetic field temporarily, and is rotatably mounted on a shaft (10).</p> |
