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Guangzhou Huilin Air Separation Equipment Co., Ltd.
Zhejiang Yuanda Air Separation Equipment Co., Ltd.
Wuhu Frontage Imp. and Exp. Co., Ltd.
Wuxi Zhongrui Air Separation Equipments Co., Ltd.
Hangzhou Chuankong General Equipment Co., Ltd.
Beijing Sunny Young Technology Company Limited
Shenzhen Guanglei Electronic Co., Ltd.
Suzhou Since Gas System Co., Ltd.
TIANJIN PUHUI SCIENCE AND TECHNOLOGY DEVELOPMENT CO., LTD.