| 摘要 |
<p>The ladder comprises at least two parallely arranged strings (1, 2), which are interconnected by means of a plurality of pivotally arranged parallel rungs (3). The holes for the pivoting points (38) of each rung are arranged in off-centered positions, which positioning increases the strength of the ladder in a surprising manner. Furthermore, the inner string (19) comprises mounting means (12) intended to co-operate with brackets (4) which substantially facilitate the attachment of a ladder.</p> |
