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Guangdong Hongsheng Testing Equipment Co., Ltd.
Nanjing T-Bota Scietech Instruments & Equipment Co., Ltd.
Shenzhen Handsome Technology Co., Ltd.
Qingdao Tlead International Co., Ltd.
Leader Precision Instrument Co., Ltd.
Zhengzhou Nanbei Instrument Equipment Co., Ltd.
Laizhou Weiyi Experimental Machinery Manufacture Co., Ltd.
Shandong China Coal Industrial & Mining Supplies Group Co., Ltd.
Sino Age Development Technology
Wuxi JinyiBo Instrument Technology Co., Ltd.