| 摘要 |
<p>The cover (14, 19) has a non-round cross-section with corners when it is open, when viewed in a plan perpendicular to the ladder beam length direction. The ladder (1) has at least one cover which can be tilted about an axis parallel to one of the ladder beams (2, 3). The cover rests on at least some of the rungs (4) to form a support surface when it is in the closed position. In the open position, the cover leaves the rungs exposed.</p> |
