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Ningxia Duoweitairui Pharmaceutical Co., Ltd. - we are one of the largest GMP certified manufacturer and exporter of animal antibiotics and feed additives in China. Main prodocts: tylosin tartrate, tylosin phosphate, tylosin phosphate 10%, 25% prem - Wangyuan Economic Zone, Yongning County, Ningxia, Yinchuan, China - Phone: 86-10-82684966 ext 816 - Fax: 86-10-82684961
