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          Youth robot festival held in C China's Hunan
          
        
          
      
          
      
          
        
          
          Xinhua |
          Updated: 2018-05-06 16:10
          
          
          
          
        


        
      
          
      
          
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   A child experiences a 3D printing pen during a youth robot festival in Longhui county, Central China's Hunan province, May 5, 2018. [Photo/Xinhua] 
 
           

           

          
        
          

        
        
      
          
        
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