Artlupus

quoteallthethings:

4,500 horsepower boring machine ‘Heidi’ breaks through at the final section of Gotthard Base Tunnel, the world’s longest rail tunnel.
(Source)

quoteallthethings:

4,500 horsepower boring machine ‘Heidi’ breaks through at the final section of Gotthard Base Tunnel, the world’s longest rail tunnel.

(Source)