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Suzhou Since Gas System Co., Ltd.
Beijing Sunny Young Technology Company Limited
Wuxi Zhongrui Air Separation Equipments Co., Ltd.
Hangzhou Chuankong General Equipment Co., Ltd.
Guangzhou Huilin Air Separation Equipment Co., Ltd.
Changsha Kingkar Eco-Technologies Co., Ltd.
Wuhu Frontage Imp. and Exp. Co., Ltd.
Zhejiang Yuanda Air Separation Equipment Co., Ltd.
Hokaido Vacuum Technology (Int'l) Group Limited