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Huge tunnel network creates new railway link through the Alps
Swiss open world's longest land tunnel
Gotthard Base Tunnel quickens train travel through Swiss Alps: Travel Weekly
World's longest tunnel a day away from seeing the light
Rail Technology for the Gotthard Base Tunnel - tunnel
Why the longest train tunnel in the world is a double-edged sword, The Independent
LÜTZE equipment has proven itself in the Gotthard Base Tunnel
Why is the Gotthard Base Tunnel so important? - SWI
Project in-depth: The Gotthard Base Tunnel, Switzerland - RTF