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 foundation隧道基础tunneling surface掘进工作面tunnel transition隧道效应tunnel- stacker巷道式堆垛机tunnel karst cave隧道溶洞tunnel regulation“利率走廊”调控tunnel elongation开延巷道tunneling process隧道过程tunnel identifier隧道标识符tunnel techniques隧道