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Hangzhou Chuankong General Equipment Co., Ltd.
Shenyang Haitong International Machinery & Equipment Co.,Ltd
Wuxi Zhongrui Air Separation Equipments Co., Ltd.
Changsha Kingkar Eco-Technologies Co., Ltd.
Hokaido Vacuum Technology (Int'l) Group Limited
Wuhu Frontage Imp. and Exp. Co., Ltd.
TIANJIN PUHUI SCIENCE AND TECHNOLOGY DEVELOPMENT CO., LTD.
Suzhou Since Gas System Co., Ltd.
Zhejiang Yuanda Air Separation Equipment Co., Ltd.
Beijing Sunny Young Technology Company Limited