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Beijing Sunny Young Technology Company Limited
Wuxi Zhongrui Air Separation Equipments Co., Ltd.
Zhejiang Yuanda Air Separation Equipment Co., Ltd.
Suzhou Since Gas System Co., Ltd.
Hangzhou Chuankong General Equipment Co., Ltd.
Changsha Kingkar Eco-Technologies Co., Ltd.
Hokaido Vacuum Technology (Int'l) Group Limited
Changzhou Andwin International Corporation Limited