excavationn.挖掘;发掘;挖掘的洞;发掘物
excavation unloading开挖卸荷
excavation of trench管沟开挖
excavation machinery开挖机械
excavation and study发掘研究
excavation retaining基坑支护
excavation subsidence采空塌陷
excavation protection开挖支护
excavation monitoring基坑监测
excavation efficiency掘进工效
Excavation technology挖掘技术