| 摘要 |
The hurdle has a beam holder (7) with free fastenings for a beam (1) or rib, in a raised position. It also has a raising support (8) with a line (26) for hook-engagement of one end to the beam (1). A drive is provided drawing in this line and simultaneous raising of the beam to its holder (7). A coupling retains the line (26) in its raised position where it is borne by the holder (8), and draws in the line (26) when the beam is raised. |
