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Hangzhou Chuankong General Equipment Co., Ltd.
Suzhou Since Gas System Co., Ltd.
Shenzhen Guanglei Electronic Co., Ltd.
Qingdao Hexin Machinery Co., Ltd.
Wuxi Zhongrui Air Separation Equipments Co., Ltd.
Changsha Kingkar Eco-Technologies Co., Ltd.
Zhejiang Yuanda Air Separation Equipment Co., Ltd.
Guangzhou Huilin Air Separation Equipment Co., Ltd.
Hokaido Vacuum Technology (Int'l) Group Limited
TIANJIN PUHUI SCIENCE AND TECHNOLOGY DEVELOPMENT CO., LTD.