excavationn.挖掘;发掘;挖掘的洞;发掘物
excavation and recycle矿化垃圾
excavation and bolting掘支锚一体化
excavation and support开挖与支护
excavation deformation挖掘错动
excavation at Yin Ruin殷墟发掘
excavation of cylinder沉井开挖
excavation and filling挖填
excavation of abutment坝肩开挖
excavation and blasting开挖爆破
excavation step by step分步开挖