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Beijing Topsky Century Holding Co., Ltd.
Jinan Handa Electron Technology Co., Ltd.
Chongqing Gold Mechanical & Electrical Equipment Co., Ltd.
TRYTE TECHNOLOGY (HUNAN) DEVELOPMENT CO., LTD.
Nengshi Analytical Sensor Co., Ltd.
Shanghai Boqu Instrument Co., Ltd.
Nanjing Kejie Analytical Instrument Co., Ltd.
Qingdao Tlead International Co., Ltd.
Shanghai Drawell Scientific Instrument Co., Ltd.
Labmen Instrument Limited
Shandong Dongrun Instrument Science and Technology Co., Ltd.
Huazheng Electric Manufacturing (Baoding) Co., Ltd.
Liaoning Huake Petroleum Apparatus Science & Technology Co., Ltd.
Shenzhen Security Electronic Equipment Co., Ltd.
Hangzhou Lohand Biological Co., Ltd.
Changzhou Andwin International Corporation Limited