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People who like reply on Critics explained not using Bến Thành-Suối Tiên tunnel TBM also for Nhổn - Hà Nội line
Ravnish Sharma on Critics explained not using Bến Thành-Suối Tiên tunnel TBM also for Nhổn - Hà Nội line (): Write off a TBM only after 2.5km of bore?
cover tunnel photo by: Matt Brown from London, England / CC BY
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