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