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XinhuaNet   29 September 2018   China   Henan Province  
<p>ZHENGZHOU, Sept. 29 (Xinhua) -- China's largest slurry tunnel boring machine (TBM) rolled off the production line in Zhengzhou, capital of central China's Henan Province, on Saturday.<br />TBMs are used to excavate tunnels using a circular cross section ...
Filed under: Construction News