评论:五爪观隧道暗河段施工技术 Construction technology of underground river section…

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五爪观隧道暗河段施工技术Construction technology of underground river section of Wuzhaoguan tunnel 五爪观隧道于DK49+274~+345(长71 m)段与五爪观暗河正交,隧道洞身完全置于暗河的厚层堆积体中.暗河地下...

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