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