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  China Tunnel Company finish patent design tunnel on 1000 km China-Laos railway

    The Jingkuan No.2 Tunnel, about 4.6 km long, is located in Jinghong City of Yunnan. The tunnel technology patent design with a super-large exit has a 80-meter stretch with fault surface of 249 square meters. The design is to reserve connection conditions for the future expansion with...

  Tags: China Railway 22nd Bureau Group Co. Ltd.

  1489 days ago