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Shanghai Yulong Vacuum Pump Co., Ltd.
Ningbo JT Pump Co., Ltd.
Shanghai Qishang International Trading Co., Ltd.
Hebei Hoffwell Industrial Pump Co., Ltd.
Changsha Aobo Carbon Co., Ltd.
Timeway Enterprise Limited
Ningbo Cowell Industry Co., Limited
Zhengzhou Nanbei Instrument Equipment Co., Ltd.
Beijing Beiyi Woosung Vacuum Technology Co., Ltd.
Shanghai Suoto Pump Industrial Co., Ltd.
Baoding Shenchen Precision Pump Co., Ltd.
Nantong Cotton Machinery Co.,Ltd
Lanshen Group Corp., Ltd.