| 摘要 |
<p>A guiding device for a balance counter-weight, housed into a box-girder, particularly for a wall board. Further, the hollow section girder has on its inner face a longitudinal guide (17, 18). Elastic straps (30), made of cured hardened rubber, are arranged above and below the counter-weight (20) and are fixed in a sliding manner to the longitudinal guide: these straps guide the counter-weight in its upwards and downwards motion.</p> |
