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Beijing Sunny Young Technology Company Limited
Hokaido Vacuum Technology (Int'l) Group Limited
Wuxi Zhongrui Air Separation Equipments Co., Ltd.
Hangzhou Chuankong General Equipment Co., Ltd.
Suzhou Since Gas System Co., Ltd.
Zhejiang Yuanda Air Separation Equipment Co., Ltd.
TIANJIN PUHUI SCIENCE AND TECHNOLOGY DEVELOPMENT CO., LTD.
Guangzhou Huilin Air Separation Equipment Co., Ltd.
Changsha Kingkar Eco-Technologies Co., Ltd.
Wuhu Frontage Imp. and Exp. Co., Ltd.