SPUTNIK / SCIENCE PHOTO LIBRARY SPUTNIK / SCIENCE PHOTO LIBRARY
Tunnel boring machine. A tunnel boring machine operating used in the construction of Nizhnyaya Maslovka station of the Moscow Metro in Russia. Opened in 1935, by 2016 the Moscow Metro had expanded to 200 stations and a route length of over 330 kilometres.
Model release not required. Property release not required.