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Huanghua Faithful Instrument Co., Ltd.
Movel Scientific Instrument Co., Ltd.
Guangdong Huilv Laboratory Equipment Scientific and Technological Co., Ltd.
Zhengzhou CY Scientific Instrument Co., Ltd.
Changzhou Danrui Experimental Instrument Equipment Co., Ltd.
Shandong China Coal Industrial & Mining Supplies Group Co., Ltd.
Zhejiang Tugong Instrument Co., Ltd.
Labmen Instrument Limited
Anhui Sada Trading Co., Ltd.