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