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