| 摘要 |
<p>It is formed by four large elements, two identical side caps (1), a front wall element (3) and a U-shaped central element (2) with a double bend, incorporating the cord openings (4), while the central element (2) is articulated on a triangular prismatic shape of the caps (1), in order to enable it to bend sidewards with respect of an inner cylinder (6) incorporating flanges and spring which passes through the front element. <IMAGE></p> |
