| 摘要 |
<p>The assembly has three metallic bands (13), each with two end legs. One leg has a shape of a fork comprising two branches. A part of one branch of the fork is arranged in a manner for being flat against one side of a metallic washer turned towards a ring (8). Another ring (6) has a groove emerging from the outside of a side wall of the ring (6). Another branch of the fork penetrates in the groove.</p> |
