| 摘要 |
823,691. Ladders. SEBEL & CO. Ltd., D. Jan. 11, 1956 [May 21, 1955], No. 14723/55. Class 20(2) [Also in Groups XIV and XXV] The legs of a step-ladder are connected by a jointed folding stay comprising bars 19, 21 pivoted together at 23, the bar 19 carrying a pivoted latch for engaging the pin 22 to lock the bars in alignment. The bar 19 is of channel section.
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