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Beijing Topsky Century Holding Co., Ltd.
Shandong Dongrun Instrument Science and Technology Co., Ltd.
Nengshi Analytical Sensor Co., Ltd.
TRYTE TECHNOLOGY (HUNAN) DEVELOPMENT CO., LTD.
Q-Ying Plastic & Electronic (Shenzhen) Co., Ltd.
Zhejiang Scientific Instruments & Materials Import & Export Co., Ltd.
Shandong China Coal Industrial & Mining Supplies Group Co., Ltd.
Qingdao Tlead International Co., Ltd.
Shenzhen Handsome Technology Co., Ltd.
Shanghai Boqu Instrument Co., Ltd.
Nanjing Kejie Analytical Instrument Co., Ltd.
Ningbo Jinghai Machinery Co., Ltd.
Jinan Handa Electron Technology Co., Ltd.
Deson Electric Group Company Limited