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Please contact us by telephone, fax, e‐mail or online: Phone:+86-10-62651721 QQ:62479775 Fax:86-10-62651521-808 E-mail:info@okeanos.com.cn Web site:www.okeanos.com.cn General Correspondence: OKeanos Tech. Co., Ltd. Beijing Biological Engineering and Medicine Industrial Base 29 Yongxing Road, Daxing District, Beijing China 102600