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    Donghai Silica Powder Passed DNV (Det Norske Veritas) ISO14001:2004 Environmenta
    
      
    2010.05.30
    
      
    On May 25, 2010, Lianyungang Donghai Silica Powder Co., Ltd. passed DNV (Det Norske Veritas) ISO14001:2004 Environmental Management System Certification.
        
    
  
    
  
    

          
    


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