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Leader Precision Instrument Co., Ltd.
Nanjing T-Bota Scietech Instruments & Equipment Co., Ltd.
Dongguan Hong Tu Instrument Co., Ltd.
Laizhou Weiyi Experimental Machinery Manufacture Co., Ltd.
Shenzhen Handsome Technology Co., Ltd.
Zhengzhou CY Scientific Instrument Co., Ltd.
Shandong China Coal Industrial & Mining Supplies Group Co., Ltd.
Wuxi JinyiBo Instrument Technology Co., Ltd.
Zhengzhou Nanbei Instrument Equipment Co., Ltd.
Sino Age Development Technology
Dongguan City Gaoxin Testing Equipment Co., Ltd.