WTC2018 - World Tunnel Congress 2018 Dubai conference bag
1851 days ago
WTC2018 - World Tunnel Congress 2018 Dubai conference bag (back)
Eurotunnel English Channel tunnel geological profile.
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Tunnel
1817 days ago
Alaskan Way Replacement Tunnel (SR99 tunnel( bored by Bertha produced by Hitachi Zosen)
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Europe's smartest tunnel in Denmark - Fehmarnbelt tunnel
1808 days ago
Swiss postal stamp for the Gottard Tunnel
1797 days ago
Brenner Base Tunnel
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Norway Underwater Tunnel
1719 days ago
Norway Underwater Tunnel 4.jpg