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Over 20 years to construct, Over 2’000 workers, Over 2’000 meters deep, Over 200 km/h fast Next week, the world’s longest and deepest traffic tunnel – the Gotthard Base Tunnel through the Alps – will be inaugurated in Switzerland. The tunnel will span a length of 57 km – with a total tunnel system including shafts and passages of over 150 km – and …
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