| 摘要 |
<p>A cross-member (1, 101) for in-wall frames of retractable sliding doors, which is substantially omega-shaped so as to define a flat base (2) and a pair of L-shaped lateral wings (3a, 3b), the cross-member having at the flat base (2), temporary axial coupling means that cooperate with one of several engagement means that are present on another, similar cross-member (101) that is selectively lockable in position by way of temporary locking means.</p> |
