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