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Junhong Electronic & Technology Co., Ltd.
Hangzhou Dooren Technology Co., Ltd.
Hunan Puqi Geologic Exploration Equipment Institute (Common Partnership)
Guangzhou DENS Technology Co., Limited
Zhongke-Lian Sheng (Shenzhen) Technology Co., Ltd.
Zhengzhou Nanbei Instrument Equipment Co., Ltd.
Weifang Better Heavy Machinery Science and Technology Co., Ltd.