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Shandong Dongrun Instrument Science and Technology Co., Ltd.
Beijing Topsky Century Holding Co., Ltd.
WANT Balance Instrument Co., Ltd.
Shanghai Boqu Instrument Co., Ltd.
Nengshi Analytical Sensor Co., Ltd.
Huazheng Electric Manufacturing (Baoding) Co., Ltd.
Shandong China Coal Industrial & Mining Supplies Group Co., Ltd.
Dongguan Haida Equipment Co., Ltd.
Labmen Instrument Limited
Nanjing Kejie Analytical Instrument Co., Ltd.
Liaoning Huake Petroleum Apparatus Science & Technology Co., Ltd.