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Shanghai Boqu Instrument Co., Ltd.
Huazheng Electric Manufacturing (Baoding) Co., Ltd.
Nengshi Analytical Sensor Co., Ltd.
Liaoning Huake Petroleum Apparatus Science & Technology Co., Ltd.
WANT Balance Instrument Co., Ltd.
Hangzhou Lohand Biological Co., Ltd.
Beijing Topsky Century Holding Co., Ltd.
Shanghai Drawell Scientific Instrument Co., Ltd.
Shandong Dongrun Instrument Science and Technology Co., Ltd.
Wincom Company Ltd.
Chongqing Gold Mechanical & Electrical Equipment Co., Ltd.
Deson Electric Group Company Limited
Qingdao Tlead International Co., Ltd.
Shandong China Coal Industrial & Mining Supplies Group Co., Ltd.
Changzhou Andwin International Corporation Limited