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Leader Precision Instrument Co., Ltd.
Guangdong Hongsheng Testing Equipment Co., Ltd.
Shenzhen Bonad Instrument Co., Ltd.
Laizhou Weiyi Experimental Machinery Manufacture Co., Ltd.
Shandong China Coal Industrial & Mining Supplies Group Co., Ltd.
Shanghai HongWei Construction Machinery Co., Ltd.
Nanjing T-Bota Scietech Instruments & Equipment Co., Ltd.
Shenzhen Handsome Technology Co., Ltd.
Qingdao Tlead International Co., Ltd.
Yueqing Haixin Electronic Science Technology Co., Ltd.
Shanghai RuiBiao Construction Machinery Co., Ltd.
Wuxi JinyiBo Instrument Technology Co., Ltd.
Sino Age Development Technology