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Zhejiang Scientific Instruments & Materials Import & Export Co., Ltd.
Shandong Dongrun Instrument Science and Technology Co., Ltd.
Fuzhou DIT Industry & Trade Co., Ltd.
Qingdao Tlead International Co., Ltd.
Shanghai Boqu Instrument Co., Ltd.
Ningbo Jinghai Machinery Co., Ltd.
Beijing Topsky Century Holding Co., Ltd.
Nengshi Analytical Sensor Co., Ltd.
Liaoning Huake Petroleum Apparatus Science & Technology Co., Ltd.
Huazheng Electric Manufacturing (Baoding) Co., Ltd.
Nanjing Kejie Analytical Instrument Co., Ltd.
WANT Balance Instrument Co., Ltd.
Jinan Handa Electron Technology Co., Ltd.
Nanjing T-Bota Scietech Instruments & Equipment Co., Ltd.