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Beijing Bctrading Science and Technology Co., Ltd.
Zhangjiagang Chuangpu Machinery Co., Ltd.
Rigchina Group Company
Wenzhou Luosimeng Machinery Co., Ltd.
Weifang Greatland Machinery Co., Ltd.
Jiangsu Tianyuan Experiment Equipment Co., Ltd.
Hebei Xukang Meter Manufacturing Co., Ltd.
Shanghai Cixi Instrument Co., Ltd.
Labmen Instrument Limited