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Shandong Dongrun Instrument Science and Technology Co., Ltd.
Nanjing Kejie Analytical Instrument Co., Ltd.
Shanghai Drawell Scientific Instrument Co., Ltd.
Beijing Topsky Century Holding Co., Ltd.
Shandong China Coal Industrial & Mining Supplies Group Co., Ltd.
Jinan Handa Electron Technology Co., Ltd.
TRYTE TECHNOLOGY (HUNAN) DEVELOPMENT CO., LTD.
Qingdao Tlead International Co., Ltd.
Huazheng Electric Manufacturing (Baoding) Co., Ltd.
Wincom Company Ltd.
WANT Balance Instrument Co., Ltd.
Labmen Instrument Limited