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Xi'an Heb Biotechnology Co., Ltd.
Jinan Handa Electron Technology Co., Ltd.
Nengshi Analytical Sensor Co., Ltd.
Huazheng Electric Manufacturing (Baoding) Co., Ltd.
Beijing Topsky Century Holding Co., Ltd.
Shandong China Coal Industrial & Mining Supplies Group Co., Ltd.
Deson Electric Group Company Limited
Nanjing Kejie Analytical Instrument Co., Ltd.
Shanghai Boqu Instrument Co., Ltd.
WANT Balance Instrument Co., Ltd.
Qingdao Tlead International Co., Ltd.
Liaoning Huake Petroleum Apparatus Science & Technology Co., Ltd.
Labmen Instrument Limited