| 摘要 |
The bridge (7) is divided into two halves (7.1,7.2) along a diagonal in a quadrilateral. Each half has a triangular shape, and is pivotable around an axis at the land fixture (4,5). The point of each bridge half which is opposite to the corresp. land fixture in the bridge half lowered position rests on the land fixture or on a support at the fixture. - The bridge halves are coupled to drive mechanisms at the land fixtures so that they are separately pivotable upwards from their lowered positions to a raised position. The upward pivoting occurs around a pivot axis parallel with the respective bridge half base. |
