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Nanjing T-Bota Scietech Instruments & Equipment Co., Ltd.
Zhengzhou Nanbei Instrument Equipment Co., Ltd.
Laizhou Weiyi Experimental Machinery Manufacture Co., Ltd.
Sino Age Development Technology
Qingdao Tlead International Co., Ltd.
Wuxi JinyiBo Instrument Technology Co., Ltd.
Leader Precision Instrument Co., Ltd.
Shandong China Coal Industrial & Mining Supplies Group Co., Ltd.
Zhengzhou CY Scientific Instrument Co., Ltd.
Shenzhen Handsome Technology Co., Ltd.