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