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World's widest immersed tube tunnel under construction in S. China 

      

      
 Source: Xinhua| 2019-07-05 21:26:42|Editor:  Xiaoxia 

      

            
      

      

      

      

      

      
    

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      Mega project! A sneak peek at world's widest immersed tube tunnel, currently under construction in Guangdong, China.
       

      

      

      
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