GB/T 39963-2021立井冻结法凿井井壁应用C80~C100混凝土技术规程Technical specification on C80~C100 concrete shaft lining applied in vertical freezing shaft GB/T 39963-2021立井冻结法凿井井壁应用C80~C100混凝土技术规程Technical specification on C80~C100 concrete shaft lining applied in vertical freezing shaft

GB/T 39963-2021立井冻结法凿井井壁应用C80~C100混凝土技术规程Technical specification on C80~C100 concrete shaft lining applied in vertical freezing shaft

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  • raybet雷电竞电竞app下载地址 编号:GB/T 39963-2021
  • raybet雷电竞电竞app下载地址 状态:现行
  • 更新时间:2022-10-24
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