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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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