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Beijing Topsky Century Holding Co., Ltd.
Jinan Handa Electron Technology Co., Ltd.
Huazheng Electric Manufacturing (Baoding) Co., Ltd.
Wincom Company Ltd.
Qingdao Tlead International Co., Ltd.
Nengshi Analytical Sensor Co., Ltd.
WANT Balance Instrument Co., Ltd.
Shanghai Drawell Scientific Instrument Co., Ltd.
Shenzhen Security Electronic Equipment Co., Ltd.
Chongqing Gold Mechanical & Electrical Equipment Co., Ltd.
Shandong China Coal Industrial & Mining Supplies Group Co., Ltd.
TRYTE TECHNOLOGY (HUNAN) DEVELOPMENT CO., LTD.
Shanghai Boqu Instrument Co., Ltd.