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