谢谢, 那架子怎能固定在垂直外墙呐? 仅靠支架那2脚的摩擦力?

回答: sure it is safer but..borisg2023-11-30 06:14:31

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yes. that's why the lower ends of ladder need be -borisg- 给 borisg 发送悄悄话 borisg 的博客首页 (27 bytes) () 11/30/2023 postreply 07:10:57

哦.学习了.谢谢. -pickshell- 给 pickshell 发送悄悄话 (0 bytes) () 11/30/2023 postreply 07:51:11

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