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Junhong Electronic & Technology Co., Ltd.
3rd Eye Electronics Co., Ltd.
Hangzhou Dooren Technology Co., Ltd.
Zhongke-Lian Sheng (Shenzhen) Technology Co., Ltd.
Beijing Topsky Century Holding Co., Ltd.
Hunan Puqi Geologic Exploration Equipment Institute (Common Partnership)
Guangzhou DENS Technology Co., Limited
Zhengzhou Nanbei Instrument Equipment Co., Ltd.
Shenzhen Zhonganxie Technology Co., Ltd.