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China’s largest homemade slurry TBM excavates 5.08-km-long tunnel in Shenzhen 

      

      
 Source: Xinhua| 2019-08-14 21:50:44|Editor:  Yurou 

      

            
      


      

      

      

      
    

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      (Source: Xinhua)
       

      

      

      
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