| 摘要 |
A ladder including a first ladders rail, a second ladder rail, a first step and a support brace. The first ladder rail has a first rail front side, a first rail rear side, and a first rail web that extends between the first rail front side and the first rail rear side. The second ladder rail has a second rail front side, a second rail rear side, and a second rail web that extends between the second rail front side and the second rail rear side. The first step is attached to the first ladder rail and the second ladder rail.
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