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