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World’s Longest Underwater High-Speed Rail Tunnel Enters Full-Scale Subsea Construction Phase

World’s Longest Underwater High-Speed Rail Tunnel on “Yongzhou” TBM Begins Full Subsea Excavation On May 29, the “Yongzhou” tunnel boring machine (TBM) officially transitioned from land to subsea tunneling at a depth of 64 meters beneath the Ningbo side of…

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