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Impossible Engineering: 7x2

World's Toughest Tunnels (London's Super Sewer)

A team of engineers are overhauling London’s underground infrastructure to build a world-class sewer system. Using cutting-edge tech and the latest construction methods, they work to transform a centuries-old network into a modern-day masterpiece.

Impossible Engineering 7×2 – World’s Toughest Tunnels (London’s Super Sewer)
Jan. 08, 2020

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