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    China-Laos railway's longest tunnel holed through
    

    
Source: Xinhua|
Published: 2019-12-28

    

      
    
             
    
        
    
        
    
          
        
    
      
    
      
    
      

      
    
      
    
                        
    The longest tunnel of the China-Laos railway has been holed through.
    
 
            
      
    

    

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