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Beijing Topsky Century Holding Co., Ltd.
Nanjing Kejie Analytical Instrument Co., Ltd.
Huazheng Electric Manufacturing (Baoding) Co., Ltd.
Xi'an Heb Biotechnology Co., Ltd.
Shandong China Coal Industrial & Mining Supplies Group Co., Ltd.
Nengshi Analytical Sensor Co., Ltd.
Zhejiang Holy Laser Technology Co.,Ltd.
Shanghai Drawell Scientific Instrument Co., Ltd.
HV Hipot Electric Co., Ltd.
Zhuhai City Deyuan Import & Export Co., Ltd.
Fuzhou DIT Industry & Trade Co., Ltd.
Wincom Company Ltd.
Xi'an Tosilon Automation Co., Ltd.