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  3. S02E05 (World's Longest Tunnel)
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  • Estados Unidos
  • April 14, 2015

Ingeniería de lo imposible

World's Longest Tunnel

Temporada 2 Episodio 5

How did engineers move mountains to build the longest and deepest rail tunnel on the planet? Discover how 25 million tons of rock were moved to build this modern wonder, the Gotthard Base Tunnel.

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