摘要 |
<p>The unit has a graduated collar, where the unit is designed as a two-piece. A portion (1`) of the unit is movably arranged relative to a portion (1``), where the portions partially overlap each other and the overlapping degree is variable. The displacement of the parts is independent of one another and is effected by a motor. The parts are completely reversed so that the display (2) is completely visible.</p> |