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Chongqing Gold Mechanical & Electrical Equipment Co., Ltd.
Nengshi Analytical Sensor Co., Ltd.
Nanjing Kejie Analytical Instrument Co., Ltd.
Shanghai Boqu Instrument Co., Ltd.
Qingdao Tlead International Co., Ltd.
Jinan Handa Electron Technology Co., Ltd.
Beijing Topsky Century Holding Co., Ltd.
Shenzhen Handsome Technology Co., Ltd.
Fuzhou DIT Industry & Trade Co., Ltd.
Wincom Company Ltd.
Shenzhen Security Electronic Equipment Co., Ltd.
Shanghai Drawell Scientific Instrument Co., Ltd.
Huazheng Electric Manufacturing (Baoding) Co., Ltd.
Shandong China Coal Industrial & Mining Supplies Group Co., Ltd.