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Laizhou Weiyi Experimental Machinery Manufacture Co., Ltd.
Shenzhen Bonad Instrument Co., Ltd.
Shandong China Coal Industrial & Mining Supplies Group Co., Ltd.
Shanghai HongWei Construction Machinery Co., Ltd.
Zhengzhou CY Scientific Instrument Co., Ltd.
Shenzhen Handsome Technology Co., Ltd.
Nanjing T-Bota Scietech Instruments & Equipment Co., Ltd.
Shenzhen Pride Instrument Inc.
Yueqing Haixin Electronic Science Technology Co., Ltd.
Leader Precision Instrument Co., Ltd.
Qingdao Tlead International Co., Ltd.
Shanghai RuiBiao Construction Machinery Co., Ltd.
Wuxi JinyiBo Instrument Technology Co., Ltd.