| 摘要 |
<p>The device has a square tube (3) fastened to rear part of a floor construction (1) by screws (5). The floor construction is provided with a cover plate made of metal or wood (2), where the device is made of iron. The square tube is inserted into a first bush (4), and a second bush (6) is placed over the square tube, where the square tube is formed with boreholes (7). Two round bars slide on the square tube by a third bush (8), and a U-shaped round tube (10) is bolted on the square tube and encased with a pad material such as foam material or leather.</p> |
