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