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Deson Electric Group Company Limited
Shandong China Coal Industrial & Mining Supplies Group Co., Ltd.
Beijing Topsky Century Holding Co., Ltd.
Qingdao Tlead International Co., Ltd.
WANT Balance Instrument Co., Ltd.
Jinan Handa Electron Technology Co., Ltd.
Nanjing Kejie Analytical Instrument Co., Ltd.
Nengshi Analytical Sensor Co., Ltd.
Liaoning Huake Petroleum Apparatus Science & Technology Co., Ltd.
Shandong Dongrun Instrument Science and Technology Co., Ltd.
Huazheng Electric Manufacturing (Baoding) Co., Ltd.
Ningbo Jinghai Machinery Co., Ltd.