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