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Timeway Enterprise Limited
Development Vacuum Equipment (Sanmen) Co., Ltd.
Zhengzhou Nanbei Instrument Equipment Co., Ltd.
Zhejiang Yonjou Technology Co., Ltd.
Jiangsu Hongsheng Pump Industry Technology Co., Ltd.
Henan Yugong Machinery Co., Ltd.
Shanghai Yulong Vacuum Pump Co., Ltd.
Guangzhou Hundom Technology Co., Ltd.
Baoding Shenchen Precision Pump Co., Ltd.
Lanshen Group Corp., Ltd.