[热点讨论]求助：焊缝口开挖方式 [复制链接]

cdddd:挡土墙外侧擅自挖坑倒塌亡人案例 9tk" :ld  
http://www.safehoo.com/Case/Case/Collapse/201506/398805.shtml (2021-01-12 22:33)  Pz@/|&]  

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cdddd:环缝自动焊机 "JT;gaEm  
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....... (2021-01-13 07:52)  Ade}g'  

cdddd:靠近楼房挖坑的安全距离安全知识 T>d.#  
https://www.bbaqw.com/anquan/531529/ (2021-01-13 07:53)  (! KG)!