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          China-developed technologies help create a better world
          
        
          
      
          
      
          
        
          
          chinadaily.com.cn |
          Updated: 2022-04-27 10:59
          
          
          
          
        


        
      
          
      
          
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   China's self-developed deep sea acoustic recorder is on display at a maritime technology expo in Qingdao, East China's Shandong province, on Sept 22, 2020. [Photo/VCG] 
 
           

          
          
        
          

        
        
      
          
        
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