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Jinan Handa Electron Technology Co., Ltd.
Shenzhen Security Electronic Equipment Co., Ltd.
Shandong Dongrun Instrument Science and Technology Co., Ltd.
Shanghai Boqu Instrument Co., Ltd.
Nengshi Analytical Sensor Co., Ltd.
Nanjing Kejie Analytical Instrument Co., Ltd.
Zhejiang Scientific Instruments & Materials Import & Export Co., Ltd.
Beijing Topsky Century Holding Co., Ltd.
Nanjing T-Bota Scietech Instruments & Equipment Co., Ltd.
Shanghai Drawell Scientific Instrument Co., Ltd.
Shandong China Coal Industrial & Mining Supplies Group Co., Ltd.