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Beijing Topsky Century Holding Co., Ltd.
Chongqing Gold Mechanical & Electrical Equipment Co., Ltd.
Nengshi Analytical Sensor Co., Ltd.
Jinan Handa Electron Technology Co., Ltd.
Liaoning Huake Petroleum Apparatus Science & Technology Co., Ltd.
Qingdao Tlead International Co., Ltd.
WANT Balance Instrument Co., Ltd.
Shenzhen Security Electronic Equipment Co., Ltd.
Xi'an Heb Biotechnology Co., Ltd.
Ningbo Jinghai Machinery Co., Ltd.
Nanjing Kejie Analytical Instrument Co., Ltd.
HV Hipot Electric Co., Ltd.
Shanghai Drawell Scientific Instrument Co., Ltd.
Shanghai Boqu Instrument Co., Ltd.
Labmen Instrument Limited
Huazheng Electric Manufacturing (Baoding) Co., Ltd.