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Beijing Sunny Young Technology Company Limited
Wuxi Zhongrui Air Separation Equipments Co., Ltd.
Hangzhou Chuankong General Equipment Co., Ltd.
Suzhou Since Gas System Co., Ltd.
Shenzhen Guanglei Electronic Co., Ltd.
Changzhou Andwin International Corporation Limited
Hokaido Vacuum Technology (Int'l) Group Limited
TIANJIN PUHUI SCIENCE AND TECHNOLOGY DEVELOPMENT CO., LTD.