The main studying contents of this thesis are optimization-design of the mixture ratio of tunnel's secondary lining concrete and internal structural analysis.
本文的主要研究内容为隧道二次衬砌混凝土配合比优化设计及其结构内力分析。
The main studying contents of this thesis are optimization-design of the mixture ratio of tunnel's secondary lining concrete and internal structural analysis.
本文的主要研究内容为隧道二次衬砌混凝土配合比优化设计及其结构内力分析。
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