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