“La Matucana”, the tunnel boring machine developed by China Railway Construction Corporation (CRCC) has started boring on May 9 at Santiago Metro Line 7.

It is the first time in the history of Chile that the TBM method is used for the construction of a tunnel.

https://dangdai.com.ar/2024/05/09/crcc-construira-una-nueva-linea-de-subte-en-santiago/