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Shenzhen Bonad Instrument Co., Ltd.
Shenzhen Pride Instrument Inc.
Laizhou Weiyi Experimental Machinery Manufacture Co., Ltd.
Shanghai RuiBiao Construction Machinery Co., Ltd.
Leader Precision Instrument Co., Ltd.
Shandong China Coal Industrial & Mining Supplies Group Co., Ltd.
Guangdong Hongsheng Testing Equipment Co., Ltd.
Nanjing T-Bota Scietech Instruments & Equipment Co., Ltd.
Zhengzhou Nanbei Instrument Equipment Co., Ltd.
Qingdao Tlead International Co., Ltd.
Zhengzhou CY Scientific Instrument Co., Ltd.
Dongguan Hong Tu Instrument Co., Ltd.
Bestone Industrial Limited
Sino Age Development Technology