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Jinan Handa Electron Technology Co., Ltd.
Qingdao Tlead International Co., Ltd.
Shanghai Drawell Scientific Instrument Co., Ltd.
Beijing Topsky Century Holding Co., Ltd.
Shanghai Boqu Instrument Co., Ltd.
TRYTE TECHNOLOGY (HUNAN) DEVELOPMENT CO., LTD.
Nanjing T-Bota Scietech Instruments & Equipment Co., Ltd.
Deson Electric Group Company Limited
Nengshi Analytical Sensor Co., Ltd.
Huazheng Electric Manufacturing (Baoding) Co., Ltd.
Shandong China Coal Industrial & Mining Supplies Group Co., Ltd.
WANT Balance Instrument Co., Ltd.
Wincom Company Ltd.