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Tunnel construction

technology Maturity 11-13

People build tunnels underground.

Paris Metro construction 03300288-3.jpg
Paris Metro construction 03300288-3.jpg
Some are made in a deep ditch. Then they are covered up. Big machines can also dig holes.
TBM S-210 Alptransit Faido East.jpg
TBM S-210 Alptransit Faido East.jpg
These tunnels help us travel. They are very cool! Do you like tunnels?

44 words
🖼️ Images & Media (7)
File:München_Marienplatz_Tunnelerweiterung.jpg
München_Marienplatz_Tunnelerweiterung.jpg
File:Paris Metro construction 03300288-3.jpg
Paris Metro construction 03300288-3.jpg
File:TBM S-210 Alptransit Faido East.jpg
TBM S-210 Alptransit Faido East.jpg
File:Mersey Railway Tunnel - ventilation and drainage machinery.png
Mersey Railway Tunnel - ventilation and...
File:Hill 60 illowra battery port kembla.jpg
Hill 60 illowra battery port kembla.jpg
File:Georgiaaquariumtunnel.jpg
Georgiaaquariumtunnel.jpg
File:Kolektory Praha, 15.jpg
Kolektory Praha, 15.jpg
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📚 Content adapted from Wikipedia | Readability: FK 11.6 | Vital Level 5