短語(yǔ)詞組短語(yǔ)unprotected open cut excavation 放坡開(kāi)挖open -excavation 明挖open channel excavation 明槽開(kāi)挖open pit excavation 露天開(kāi)采constructed by open excavation 明挖法施工open excavation construction 明挖施工open excavation order method 明挖順作法open tunnel subsurface excavation 明洞暗做open excavation and shallow cov -erage 淺埋明挖 返回 open excavation