| 摘要 |
<p>The vice has a power amplifier (1) having a primary group (P) and a power-amplifying secondary group (S). The primary group includes a wedge-shaped primary element (2), which, like the secondary group, can move in a straight line. There are first and second contacting roll pairs (6, 7). The primary element has two wedges (26, 27).</p> |
