摘要 |
<p>The device has a turning part (4) mounted on the top of a main body (3) and a head (4b) formed on top of the turning part. An insertion cam (9) is mounted under the body for cooperating with rail fastenings. The head or the turning part is positioned angularly independent from the usage position of the cam to place a push bar (27) at the interior of a safety zone.</p> |