| 摘要 |
<p>The trolley (1) which can be displaced along a rail (10) has a braking cam (9) mounted on a spindle (5) with a spring (6) with an anchoring point (4) at the end of the cam. At the opposite end of the cam is a claw (7) able to pivot and rub against a rail flat (14) and thus lock the trolley.</p> |
