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China's largest homemade slurry tunnel boring machine rolls off production line
XinhuaNet   29 September 2018   China   Henan Province  
China's largest slurry tunnel boring machine (TBM) rolls off the production line in Zhengzhou, capital of central China's Henan Province, Sept. 29, 2018
<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 ...
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