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  Altun Mountains Tunnel on Golmud-Korla railway line dug through China #Qinghai province and Xinjiang #Uygur autonomous region conection http://english.www.gov.cn/news/photos/201911/20/content_WS5dd49455c6d0bcf8c4c17767.html #China #Tunnel #Technology

  Tags: Qinghai, Uygur, China, Tunnel, Technology

  1587 days ago