Certificate of “Black Ring "acetylene carbon black Gold Medal  issued by National Quality Evaluation Committee in 1985
    
Certificate of “Black Ring "acetylene carbon black Gold Medal  issued by National Quality Evaluation Committee in 1991
      
"National Quality Award"issued by National Economic Committee
         

Gold Medal of “XING YU CUP” issued by Government of Henan Province
 
Certificate of Quality System Authentication issued by China Classification Society
 
Certificate of Quality System Authentication issued by China Classification Society

 

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