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Leader Precision Instrument Co., Ltd.
Nanjing T-Bota Scietech Instruments & Equipment Co., Ltd.
Shenzhen Handsome Technology Co., Ltd.
Qingdao Tlead International Co., Ltd.
Shandong China Coal Industrial & Mining Supplies Group Co., Ltd.
Laizhou Weiyi Experimental Machinery Manufacture Co., Ltd.
Shanghai RuiBiao Construction Machinery Co., Ltd.