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Jinan Handa Electron Technology Co., Ltd.
Shandong Dongrun Instrument Science and Technology Co., Ltd.
Qingdao Tlead International Co., Ltd.
Nengshi Analytical Sensor Co., Ltd.
WANT Balance Instrument Co., Ltd.
Shenzhen Handsome Technology Co., Ltd.
Huazheng Electric Manufacturing (Baoding) Co., Ltd.
Hangzhou Lohand Biological Co., Ltd.
Shandong China Coal Industrial & Mining Supplies Group Co., Ltd.
Wincom Company Ltd.
Zhuhai City Deyuan Import & Export Co., Ltd.
Beijing Topsky Century Holding Co., Ltd.