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Zhengzhou Hepo International Trading Co., Ltd.
Shanghai Drawell Scientific Instrument Co., Ltd.
Nanjing Kejie Analytical Instrument Co., Ltd.
Wincom Company Ltd.
Zhejiang Tugong Instrument Co., Ltd.
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Shenzhen Bonad Instrument Co., Ltd.
Movel Scientific Instrument Co., Ltd.
Xinxiang Hengyu Machinery Equipment Co., Ltd.
Shenzhen Pride Instrument Inc.
Zhengzhou Nanbei Instrument Equipment Co., Ltd.
Shandong China Coal Industrial & Mining Supplies Group Co., Ltd.
Qingdao Tlead International Co., Ltd.