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Shenzhen Slinya Electronic Co., Ltd.
Jinjiang Jiaxing Group Co., Ltd.
Dongguan Haida Equipment Co., Ltd.
Jinan Youlyy Industrial Co., Ltd.
Tianjin Humanda Technology Development Co., Ltd.
Guangzhou Lixiang Trade Development Co., Ltd.
Canfort Laboratory and Education Supplies Co., Ltd.
Laizhou Weiyi Experimental Machinery Manufacture Co., Ltd.
Xiuyan Precision Instrument Factory
Wincom Company Ltd.
Shandong China Coal Industrial & Mining Supplies Group Co., Ltd.
Foshan Sident Technology Limited
Zhongke-Lian Sheng (Shenzhen) Technology Co., Ltd.
Qingdao Tlead International Co., Ltd.
Zhengzhou Huaer Electro-Optics Technology Co., Ltd.
Century Hongking (Xiamen) Electronics Technology Co., Ltd.
Ergas Technology Co., Ltd.
Zhengzhou CY Scientific Instrument Co., Ltd.