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Qingdao Tlead International Co., Ltd.
Nengshi Analytical Sensor Co., Ltd.
WANT Balance Instrument Co., Ltd.
Beijing Topsky Century Holding Co., Ltd.
Jinan Handa Electron Technology Co., Ltd.
Shenzhen Handsome Technology Co., Ltd.
Liaoning Huake Petroleum Apparatus Science & Technology Co., Ltd.
TRYTE TECHNOLOGY (HUNAN) DEVELOPMENT CO., LTD.
Dongguan Haida Equipment Co., Ltd.
Labmen Instrument Limited
Zhejiang Scientific Instruments & Materials Import & Export Co., Ltd.