tunnelern.隧道掘进机tunneln.隧道；地道；洞穴v.挖地道；挖隧道Tunnel landslide隧道塌方tunnel structure隧道结构tunnel mechanism隧道机制Tunnel explosion隧道爆炸tunnel injection隧道注入tunnel tube wave隧道管波tunnel detection隧道检测tunneled walkway隧道式人行道tunnel man-bus平巷人车tunnel switching隧道交换