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Beijing DK nano technology Co.LTD
TEL：010 -64918089 FAX：010-64916735 QQ ：2095314344
MSN: dknano@hotmail.com E-mail: beijingdaoking@163.com Beijing ICP preparation 05022501Number
Beijing public security network 51010702000618 Number
2095314344
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135-5244-5604
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