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Wincom Company Ltd.
Nengshi Analytical Sensor Co., Ltd.
Qingdao Tlead International Co., Ltd.
Shandong China Coal Industrial & Mining Supplies Group Co., Ltd.
Huazheng Electric Manufacturing (Baoding) Co., Ltd.
TRYTE TECHNOLOGY (HUNAN) DEVELOPMENT CO., LTD.
Nanjing Kejie Analytical Instrument Co., Ltd.
Beijing Topsky Century Holding Co., Ltd.
Shandong Dongrun Instrument Science and Technology Co., Ltd.
Shenzhen Security Electronic Equipment Co., Ltd.
Jinan Handa Electron Technology Co., Ltd.