Tunnel Boring Machine Gabi One
The Gabi One is a tunnel boring machine (TBM). Tunnel boring machines are used to excavate tunnels with a circular cross section through a variety of soil and .\r
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Full Documentary, Largest Dams, Documentary,documentary films,documentary history channel,documentary 2014,documentary history,documentary on serial .\r
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discovery, discovery channel, history channel,animal planet ,national geographic Suscribe to watch more new videos : Playlist .\r
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Welcome to the worlds greatest Documentary library - a place where documentaries are regarded as the supreme form of expression. This video is for .