| 摘要 |
<p>The system has a docking ring (2) sliding in a rail (1) that comprises a locking unit movable between a locking position and a sliding position. The locking unit has an upper rack (32) with protrusions (324) which traverse slots (16) of the rail and emerge in a slider (14) to enter into a complementary shaped housing (23) on a lower face of the ring such that the ring is locked and cannot slide in the slider.</p> |
