Er Lang Shan Tunnel
Source：CCCCTime：2021-08-31
The Er Lang Shan Tunnel of the Sichuan-Tibet Highway was the longest single-hole bi-directional tunnel with the highest altitude among all the tunnels opened to traffic upon its construction comple...
The Er Lang Shan Tunnel of the Sichuan-Tibet Highway was the longest single-hole bi-directional tunnel with the highest altitude among all the tunnels opened to traffic upon its construction completion.
Editor: CCCC
