Tianjin Master Co.,Ltd.   Changzhou Kexuan Machinery Co., Ltd.   Tianjin Institudes for Drug Control   Bejing xuanfeng Company   Tianjin Kelioil Engineering Material and Technology Co.,Ltd   Tianjin Baitu Chemical Co.Ltd   tianjin yeats technology&chemical co.,ltd.   Tianjin zongyan techonlogy Co,.Ltd   tianjin dongshen international trading co.,ltd   Hebei ao xuan import and export trade co., LTD   Hebei Ao Xuan Import and Export Trade Co., LTD   Hebei ao xuan import and export trade co., LTD   Hebei ao xuan import and export trade co., LTD   Tianjin Dalipu Oil Country Tubular Goods Co., Ltd   Tianjin Botongda Energy Technology Co.,Ltd   Tianjin Chempharmatech Co.,Ltd.   Tianjin Chempharmatech Co.,Ltd.   Humate（Tianjin）international limted   Tianjin Reliable Pharmatech Co., Ltd.   Tianjin Runsheng Cellulose Science and Technology Co., Ltd