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List of long road tunnels in China
"芷铜高速4座隧道已实现双洞贯通,年底全线所有隧道实现贯通_腾讯新闻". new.qq.com. Retrieved 2022-06-19. "G6京藏国家高速羊八井至
拉萨
段前期控制性工程试通车_政务_澎湃新闻-The Paper". www.thepaper.cn. Retrieved 2020-10-11....
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