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Chongqing Gold Mechanical & Electrical Equipment Co., Ltd.
Shanghai Boqu Instrument Co., Ltd.
Nanjing T-Bota Scietech Instruments & Equipment Co., Ltd.
Shandong China Coal Industrial & Mining Supplies Group Co., Ltd.
Nengshi Analytical Sensor Co., Ltd.
Liaoning Huake Petroleum Apparatus Science & Technology Co., Ltd.
Nanjing Kejie Analytical Instrument Co., Ltd.
Qingdao Tlead International Co., Ltd.
Wincom Company Ltd.
Beijing Topsky Century Holding Co., Ltd.
Shenzhen Security Electronic Equipment Co., Ltd.
Labmen Instrument Limited
Jinan Handa Electron Technology Co., Ltd.
Fuzhou DIT Industry & Trade Co., Ltd.