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tunnel collapse: a passageway through or under something, usually underground (especially one for trains or cars); "the tunnel reduced congestion at that intersection"; force a way through

tube collapse: conduit consisting of a long hollow object (usually cylindrical) used to hold and conduct objects or liquids or gases; electronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelope; (anatomy) any hollow cylindrical body structure; place or enclose in a tube; ride or float on an inflated tube; "We tubed down the river on a hot summer day"; convey in a tube; "inside Paris, they used to tube mail"; provide with a tube or insert a tube into

jaw collapse: holding device consisting of one or both of the opposing parts of a tool that close to hold an object; the part of the skull of a vertebrate that frames the mouth and holds the teeth; the bones of the skull that frame the mouth and serve to open it; the bones that hold the teeth

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