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Jinan Handa Electron Technology Co., Ltd.
Shandong China Coal Industrial & Mining Supplies Group Co., Ltd.
Nengshi Analytical Sensor Co., Ltd.
HV Hipot Electric Co., Ltd.
Nanjing Kejie Analytical Instrument Co., Ltd.
Chongqing Gold Mechanical & Electrical Equipment Co., Ltd.
Zhejiang Scientific Instruments & Materials Import & Export Co., Ltd.
Beijing Topsky Century Holding Co., Ltd.
Shanghai Boqu Instrument Co., Ltd.
Ningbo Jinghai Machinery Co., Ltd.
Shanghai Drawell Scientific Instrument Co., Ltd.
Zhuhai City Deyuan Import & Export Co., Ltd.