| 摘要 |
The bridge has a bay (3) displaced between a lower position for crossing a channel and a higher position for channel clearance. A support structure (12) has a lifting unit (14) which is arranged on one side (5) of the channel. The lifting unit has traction ropes whose one end is fixed to the bay and another end is connected to a traction device, while passing on pulleys which are part of the structure. |
