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Bookmark or Share- Tunnel - WikipediaTunnel in Col du Galibier, France Tunnel in Fort de Mutzig, France Decorated portal to a road tunnel in Guanajuato, Mexico Utility tunnel for heating pipes between Rigshospitalet and Amagerværket in Copenhagen, Denmark Tunnel on the Taipei Metro in Taiwan Southern portal of the 421 m long (1,381 ft) Chirk canal tunnel, Wales. A tunnel is an underground or undersea passageway.
- TBM: Tunneling Bushiness MagazineTBM: Tunneling Bushiness Magazine is the leading North American tunneling magazine.
- TUNNEL definition and meaning | Collins English DictionaryA tunnel is a long passage which has been made under the ground, usually through a hill or under the sea.
- tunnels and underground excavations - Encyclopedia Britannicatunnels and underground excavations, horizontal underground passageway produced by excavation or occasionally by nature’s action in dissolving a soluble rock, such as limestone. A vertical opening is usually called a shaft.
- Tunnels: Essential Structures in Transportation Infrastructure ...Tunnels are underground or underwater passages designed to allow transportation through or beneath natural and man-made barriers. Engineers use tunnels in diverse applications, including roads, railways, subways, and water systems.
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