短語詞組短語tunnel after excavation 隧道開挖後open tunnel subsurface excavation 明洞暗做Shallow tunnel by excavation 淺埋暗挖tunnel portal excavation 隧道洞門開挖shallow tunnel excavation 淺埋隧道開挖tunnel excavation and dewatering 隧道開挖及疏水Tunnel excavation method 隧洞開挖方法Tunnel excavation blasting 隧道開挖爆破pilot tunnel excavation 導硐掘進 返回 tunnel excavation