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