Wikipedia_040921_330px-TBM_S-210_Alptransit_Faido_East – CC

330 × 248 How Tunnel Boring Machines Work
Tunnel Boring Machine Gotthard Base Tunnel tunnel

TBM being used in the Gotthard Base Tunnel is a railway tunnel through the Swiss Alps.

Wikipedia_040921_330px-TBM_S-210_Alptransit_Faido_East – CC

Leave a Reply

Your email address will not be published. Required fields are marked *