China Railway Construction Investment Group contractor China Railway 14th Bureau Group TBM "Jiangcheng Zhuoyue" finish in manufacturing in March 1. TBM has 12.55 metre excavation diameter.

TBM now in factory test. After that, it will comes to bore under Yangtze River tunnel for Wuhan Rail Transit 12  longest subway loop line in Asia and second longest subway loop line in world.

Tunnel under Yangtze Rive is single-hole double-track tunnel. 4,011 meters. Maximum buried depth 45.5 meters.

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