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