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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.