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Beijing Topsky Century Holding Co., Ltd.
Qingdao Tlead International Co., Ltd.
Nengshi Analytical Sensor Co., Ltd.
Labmen Instrument Limited
Shanghai Drawell Scientific Instrument Co., Ltd.
Shandong China Coal Industrial & Mining Supplies Group Co., Ltd.
TRYTE TECHNOLOGY (HUNAN) DEVELOPMENT CO., LTD.
Nanjing Kejie Analytical Instrument Co., Ltd.
Jinan Handa Electron Technology Co., Ltd.
Zhejiang Scientific Instruments & Materials Import & Export Co., Ltd.
Shanghai Boqu Instrument Co., Ltd.
Xi'an Heb Biotechnology Co., Ltd.
Shandong Dongrun Instrument Science and Technology Co., Ltd.
Shenzhen Lite Technology Limited
Liaoning Huake Petroleum Apparatus Science & Technology Co., Ltd.