tunnelern.隧道掘进机tunneln.隧道；地道；洞穴v.挖地道；挖隧道tunnel surveying隧道测量tunneling effect隧道效应tunnel unloading隧道卸荷tunnel-type cap[化] 槽形泡帽tunnel photodiode隧道光电二极管tunnel hypothesis隧道假说tunnel projection管影像tunnel transistor隧道晶体管tunnel along goal沿空巷道tunnel excavation隧道开挖