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Searching Mods 浅埋暗挖法是在城市地铁隧道施工历经多地区实践基础之上提出的具有我国特色的软土隧道施工方法。它的精神实质及要领都融合十八字方针里,即“管超前、严______、短开挖、强支护、快封闭、勤量测

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JCB 325 T
JCB 325 T
FSG 0 (0)
ModHub 4.7 (58)
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