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Changzhou Andwin International Corporation Limited
Wuhu Frontage Imp. and Exp. Co., Ltd.
TIANJIN PUHUI SCIENCE AND TECHNOLOGY DEVELOPMENT CO., LTD.
Suzhou Since Gas System Co., Ltd.
Guangzhou Huilin Air Separation Equipment Co., Ltd.
Hangzhou Chuankong General Equipment Co., Ltd.
Wuxi Zhongrui Air Separation Equipments Co., Ltd.
Changsha Kingkar Eco-Technologies Co., Ltd.
Beijing Sunny Young Technology Company Limited