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Shenzhen Bonad Instrument Co., Ltd.
Guangdong Hongsheng Testing Equipment Co., Ltd.
Qingdao Tlead International Co., Ltd.
Laizhou Weiyi Experimental Machinery Manufacture Co., Ltd.
Wuxi JinyiBo Instrument Technology Co., Ltd.
Shandong China Coal Industrial & Mining Supplies Group Co., Ltd.
Shenzhen Pride Instrument Inc.
Leader Precision Instrument Co., Ltd.
Zhengzhou CY Scientific Instrument Co., Ltd.
Dongguan Hong Tu Instrument Co., Ltd.
Piezohannas Tech (Wuhan) Co., Limited
Nanjing T-Bota Scietech Instruments & Equipment Co., Ltd.
Shanghai RuiBiao Construction Machinery Co., Ltd.
Yueqing Haixin Electronic Science Technology Co., Ltd.