back fill meaning in Chinese

后面充填物
回填土
回镇

Practice of goaf back filling using solid wastes
固体废弃物充填地下采空区的实践
The application of dynamic tamping in back filled foundation treatment
浅谈强夯法处理回填土地基
Back filled region
反填充区
Discussion on feasibility of coal mining under building structures with like gypsum material back filling
似膏体充填建筑物下采煤可行性探讨
Inquiring into vault and surface subsidence control in excavation of tunnel with shallowly - buried back filling soil
浅埋回填土隧道开挖的拱顶和地表沉降控制探讨

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