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Huazheng Electric Manufacturing (Baoding) Co., Ltd.
Nanjing Kejie Analytical Instrument Co., Ltd.
Beijing Topsky Century Holding Co., Ltd.
Shandong Dongrun Instrument Science and Technology Co., Ltd.
Hangzhou Lohand Biological Co., Ltd.
Chongqing Gold Mechanical & Electrical Equipment Co., Ltd.
Qingdao Tlead International Co., Ltd.
Shandong China Coal Industrial & Mining Supplies Group Co., Ltd.
Labmen Instrument Limited
Nengshi Analytical Sensor Co., Ltd.
Zhuhai City Deyuan Import & Export Co., Ltd.
Wincom Company Ltd.
Shanghai Drawell Scientific Instrument Co., Ltd.
Liaoning Huake Petroleum Apparatus Science & Technology Co., Ltd.
Deson Electric Group Company Limited