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The Sichuan-Tibet Railway - Yigong No. 3 transverse tunnel

The Sichuan-Tibet Railway - Yigong No. 3 transverse tunnel

The Yigong Tunnel is the longest tunnel on the Sichuan-Tibet Railway

Keyword:

extremely

construction

YuXiang Second Line - Hejia Tunnel

YuXiang Second Line - Hejia Tunnel

It is one of the projects under Chongqing's three-year transportation construction plan.

Keyword:

construction

china

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