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Shanghai RuiBiao Construction Machinery Co., Ltd.
Shenzhen Bonad Instrument Co., Ltd.
Shandong China Coal Industrial & Mining Supplies Group Co., Ltd.
Laizhou Weiyi Experimental Machinery Manufacture Co., Ltd.
Guangzhou Haike Outdoor Sport Co., Ltd.
Zhengzhou Nanbei Instrument Equipment Co., Ltd.
Nanjing T-Bota Scietech Instruments & Equipment Co., Ltd.
Yueqing Haixin Electronic Science Technology Co., Ltd.
Guangdong Hongsheng Testing Equipment Co., Ltd.
Qingdao Tlead International Co., Ltd.
Sino Age Development Technology
Zhengzhou CY Scientific Instrument Co., Ltd.
Shenzhen Handsome Technology Co., Ltd.