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Shandong Dongrun Instrument Science and Technology Co., Ltd.
Beijing Topsky Century Holding Co., Ltd.
Shenzhen Security Electronic Equipment Co., Ltd.
Nanjing Kejie Analytical Instrument Co., Ltd.
Huazheng Electric Manufacturing (Baoding) Co., Ltd.
Nengshi Analytical Sensor Co., Ltd.
Nanjing T-Bota Scietech Instruments & Equipment Co., Ltd.
Qingdao Tlead International Co., Ltd.
Fuzhou DIT Industry & Trade Co., Ltd.
Shanghai Boqu Instrument Co., Ltd.
Shenzhen Handsome Technology Co., Ltd.