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152

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

Dr.-Ing. E. h. Martin Herrenknecht at a breakthrough celebration at Gotthard Base Tunnel, Gripper TBM, Ø 8,830 mm, October 26, 2006-PreviewImage

Dr.-Ing. E. h. Martin Herrenknecht at a breakthrough celebration at Gotthard Base Tunnel, Gripper TBM, Ø 8,830 mm, October 26, 2006

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