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          Drainage pipes, ancient roads found in NW China's Shaanxi
          
        
          
      
          
      
          
        
          
          Ecns.cn |
          Updated: 2021-11-19 13:28
          
          
          
          
        


        
      
          
      
          
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   An archaeologist introduces three pottery pipes unearthed in the Haojing site, which was excavated in the current city of Xi'an, Northwest China's Shaanxi province, Nov 18, 2021. [Photo/China News Service] 
 
           

           

          
        
          

        
        
      
          
        
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