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