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Digging completed for longest underground superposed dual tunnel in China
| Updated: 2017-03-02 18:12:03 | (chinadaily.com.cn) |

Digging completed for longest underground superposed dual tunnel in China

A worker drives an electro-mobile out of the tunnel on Feb 25, finishing his daily work. [Photo/Xinhua]

Digging completed for longest underground superposed dual tunnel in China

A worker waits for the operating vehicle at the tunnel entrance. [Photo/Xinhua]

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