| 摘要 |
The bridge elements (3, 5; 4, 6) are joined by at least one pivot bearing (1). The bridge elements are in the form of metal spring elements, flat or wire springs or a combination of elastic metal and plastic elements. The support element has eyelet's (14) which turn on the axis of the holders (13) fixed to the frame. The top part is in the form of an end or double end cap (15) containing one or two transverse bars (16). |
