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