E-BERK TBM breakthrough in İstanbul Çavuşdere-Bülbüldere rainwater tunnel : TunnelContact.com

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E-BERK TBM breakthrough in İstanbul Çavuşdere-Bülbüldere rainwater tunnel

By Erdem Mertoğlu 1582 days ago

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

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