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Leader Precision Instrument Co., Ltd.
Zhengzhou CY Scientific Instrument Co., Ltd.
Laizhou Weiyi Experimental Machinery Manufacture Co., Ltd.
Shenzhen Bonad Instrument Co., Ltd.
Shanghai RuiBiao Construction Machinery Co., Ltd.
Guangdong Hongsheng Testing Equipment Co., Ltd.
Qingdao Tlead International Co., Ltd.
Guangzhou Haike Outdoor Sport Co., Ltd.
Yueqing Haixin Electronic Science Technology Co., Ltd.
Dongguan City Gaoxin Testing Equipment Co., Ltd.
Dongguan Hong Tu Instrument Co., Ltd.
Shenzhen Handsome Technology Co., Ltd.
Nanjing T-Bota Scietech Instruments & Equipment Co., Ltd.