| 摘要 |
The coupling has complementary hook sections (6) on the traction chain which are carried by a movable assembly (8), having a chassis (9) with rollers (10). The assembly has a part (11a) of a coupling with the trolley having the complementary part of the coupling. The coupling (11) has a pivot (13) carried by the chassis with a vertical axis. A gripper (14) is carried by the movable assembly to engage the pivot. The gripper is controlled by a drive (15).
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