工业化的秘密:秦岭隧道
Highway tunnels cross over rail tunnels at the Qinling mountains in northwest China's Shaanxi province pic.twitter.com/RMPapaljzp
— Eva 郑 ????? (@evazhengll) November 26, 2021
Highway tunnels cross over rail tunnels at the Qinling mountains in northwest China's Shaanxi province pic.twitter.com/RMPapaljzp
— Eva 郑 ????? (@evazhengll) November 26, 2021