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Shanghai Drawell Scientific Instrument Co., Ltd.
Nanjing Kejie Analytical Instrument Co., Ltd.
Shandong China Coal Industrial & Mining Supplies Group Co., Ltd.
Shenzhen Pride Instrument Inc.
Jiangsu Tianyuan Experiment Equipment Co., Ltd.
Henan Forever Medical Co., Ltd.
Zhengzhou Nanbei Instrument Equipment Co., Ltd.
Xinxiang Hengyu Machinery Equipment Co., Ltd.