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Jincheng Group Imp. & Exp. Co., Ltd.
SCB Vacuum Tech Limited
Ningbo High-Tech Zone Tosion International Trade Co., Ltd.
Guangzhou Hundom Technology Co., Ltd.
Jiangsu Hongsheng Pump Industry Technology Co., Ltd.
Changsha TOPS Industry & Technology Co., Ltd.
Baoding Shenchen Precision Pump Co., Ltd.
Zhengzhou Nanbei Instrument Equipment Co., Ltd.
Zhejiang Yonjou Technology Co., Ltd.
Changsha Aobo Carbon Co., Ltd.
Hebei Hoffwell Industrial Pump Co., Ltd.
Zhejiang Qifeng Pump Industry Co., Ltd.
Shandong Zhangqiu Blower Co., Ltd.
Shanghai Yulong Vacuum Pump Co., Ltd.