片语
open excavation construction明挖施工
open excavation and shallow cov-erage浅埋明挖
open tunnel subsurface excavation明洞暗做
open excavation order method明挖顺作法
open channel excavation明槽开挖
open pit excavation露天开采
unprotected open cut excavation放坡开挖
constructed by open excavation明挖法施工