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Beijing Topsky Century Holding Co., Ltd.
Nengshi Analytical Sensor Co., Ltd.
Jinan Handa Electron Technology Co., Ltd.
WANT Balance Instrument Co., Ltd.
Wincom Company Ltd.
Shanghai Drawell Scientific Instrument Co., Ltd.
Changzhou Andwin International Corporation Limited
HV Hipot Electric Co., Ltd.
Shandong Dongrun Instrument Science and Technology Co., Ltd.
Fuzhou DIT Industry & Trade Co., Ltd.
Labmen Instrument Limited
Liaoning Huake Petroleum Apparatus Science & Technology Co., Ltd.