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    • Ji-Yu Doko

      Tunnelling and Underground Space Associations of The World

      Tunnelling Association of India C/o CBIP Building Plot No. 4, Institutional Area, Malcha Marg,Chanakyapuri, New Delhi 110021 http://www.tai.org.in/ Korean Tunnelling and Underground Space Association

      • Pankaj

        Cutter and tools

        ...ing tools, shield tail brushes and main bearings sealed oil and grease for urban rail engineering construction   　　The company covers an area of 16000 square meters, has m...

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

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