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China's first undersea subway tunnel taking shape
chinadaily.com.cn | 2017-02-28 10:14
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Construction workers are building China's first undersea subway tunnel in Qingdao, a coastal city in East China's Shandong province, Feb 22, 2017. The length of the tunnel will be 8.1 kilometers, and the track will reach depths of up to 85 meters below sea level. [Photo/VCG] |
