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People who like reply on Herrenknecht builds a 17.5-meter mega TBM to cross under the Yellow River in China

    Ravnish Sharma
    Ravnish Sharma on Herrenknecht builds a 17.5-meter mega TBM to cross under the Yellow River in China (): German TBM best.

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    cover tunnel photo by: Matt Brown from London, England / CC BY

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