tunnelingn.掘进；开挖隧道；遂道工程；隧穿动词tunnel的现在分词形式.tunneln.隧道；地道；洞穴v.挖地道；挖隧道tunnel in service在役隧道tunnelled winding埋入式绕组tunnel collapsing隧道塌方tunneling current隧道效应电流tunnel constructs隧道衬砌施工tunneling assmbly掘进机械tunnel inspection隧道检测tunneling spectra隧道谱tunnel supporting巷道支护tunnel technology隧道技术