| 摘要 |
The ladder has two stringers connected by staves and one horizontal platform as a plate. The plate has two pairs of hooks with one of those placed under the plate near its front edge resting on the chosen by height for comfortable implementation of work stave of the ladder, and the other one is by means of axles connected at the sides of the plate near its back edge, attached at the next upward stave of the ladder.
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