双线铁路隧道Ⅳ级围岩深埋地段二次衬砌采用素混凝土结构的方案论证
쌍선철로수도Ⅳ급위암심매지단이차츤체채용소혼응토결구적방안론증
Demonstration of a Plain Concrete Secondary Lining for a Double-Track Railway Tunnel Section in Deep-Buried Surrounding Rock of Grade Ⅳ
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