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