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Jinan Handa Electron Technology Co., Ltd.
Shandong China Coal Industrial & Mining Supplies Group Co., Ltd.
WANT Balance Instrument Co., Ltd.
Beijing Topsky Century Holding Co., Ltd.
Nengshi Analytical Sensor Co., Ltd.
Nanjing Kejie Analytical Instrument Co., Ltd.
Qingdao Tlead International Co., Ltd.
Wincom Company Ltd.
Fuzhou DIT Industry & Trade Co., Ltd.
Huazheng Electric Manufacturing (Baoding) Co., Ltd.
Labmen Instrument Limited
Shanghai Drawell Scientific Instrument Co., Ltd.
Shandong Dongrun Instrument Science and Technology Co., Ltd.