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  China-Laos railway tunnels' construction has made a decisive breakthrough, with its longest tunnel 9,384-meter-long Ban Sen No.2 Tunnel, south to the ancient Lao capital of Luang Prabang, drilled through on Friday morning in the tropical mountains of northern Laos. http://www.xinhuanet.com/engli...

  Tags: CREC5, China, tunnel, technoloigy

  1587 days ago