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China - Laos: 167 tunnels on China-Laos Railway undergo comprehensive "health inspection"
By Caihong Wen
China Railway Kunming Bureau Group Co., Ltd. inspect 167 tunnels on China-Laos railways.
https://big5.news.cn/gate/big5/www.yn.xinhuanet.com/20241031/4f46e1d157ba4ba1948a589242786ca0/c.html
cover tunnel photo by: Matt Brown from London, England / CC BY
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