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Tunnel builders sweat it out on new rail line

By Hu Yongqi | China Daily | Updated: 2013-07-04 07:56

Tunnel builders sweat it out on new rail line

Workers in the Taiyangzhai tunnel, one of six tunnels longer than 5 km, on a key section of the railway connecting Hekou and Mengzi in Yunnan province. Photos by Feng Yongbin / China Daily

Tunnel builders sweat it out on new rail line

Tunnel builders sweat it out on new rail line

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