坚硬岩层环境下复杂空间开挖及大高差变截面大体积混凝土施工技术
견경암층배경하복잡공간개알급대고차변절면대체적혼응토시공기술
Excavation in Hard Strata and Construction Technology of Mass Concrete with Large Elevation Difference Variable Cross-section in Complex Space
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