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Jinan Handa Electron Technology Co., Ltd.
Qingdao Tlead International Co., Ltd.
Deson Electric Group Company Limited
Beijing Topsky Century Holding Co., Ltd.
Shandong Dongrun Instrument Science and Technology Co., Ltd.
Nanjing Kejie Analytical Instrument Co., Ltd.
Shanghai Drawell Scientific Instrument Co., Ltd.
Shanghai Boqu Instrument Co., Ltd.
WANT Balance Instrument Co., Ltd.
Chongqing Gold Mechanical & Electrical Equipment Co., Ltd.
Liaoning Huake Petroleum Apparatus Science & Technology Co., Ltd.
HV Hipot Electric Co., Ltd.