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