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152

km of tunnels, shafts, and galleries have been created at the St. Gotthard

Final breakthrough at the Gotthard Base Tunnel on 15 Oct. 2010, Switzerland, Gripper TBM, Ø 9,430mm-PreviewImage

Final breakthrough at the Gotthard Base Tunnel on 15 Oct. 2010, Switzerland, Gripper TBM, Ø 9,430mm

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