The Gaoligongshan Tunnel, a full-line control project, has a total length of 34.538 kilometers and adopts "through-level guide + 1 main (auxiliary) inclined shaft + 2 main (auxiliary)...
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cover tunnel photo by: Matt Brown from London, England / CC BY
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大瑞鐵路高黎貢山隧道建設取得進展_新華網
big5.news.cn大瑞鐵路高黎貢山隧道建設取得進展-隨著1號豎井順利完成第一模正洞襯砌,大瑞鐵路高黎貢山隧道向著全面貫通的目標任務,再次大步抵近。