| 摘要 |
<p>The arrangement consists of a short length of U section (19) in the centre of which a nut (22) is mounted. Two strips (30) can hinge centrally from the sides of the U section. The strips are serrated (34) on the side, which face one another. A locking ring (40) has two slots with which it can be passed over the strip. The strips can be hinged flat with the U section so that the U section can be inserted through a hole in a panel and hinged back to lie behind the panel. The serrated strips can be trimmed and folded flush with the wall to retain the locking ring.</p> |
