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Junhong Electronic & Technology Co., Ltd.
Zhongke-Lian Sheng (Shenzhen) Technology Co., Ltd.
Hangzhou Dooren Technology Co., Ltd.
Hunan Puqi Geologic Exploration Equipment Institute (Common Partnership)
Zhengzhou Nanbei Instrument Equipment Co., Ltd.
Hongkong Joint Stars Group Limited
Zhuozhou Tianpeng Imp. & Exp. Trade Co., Ltd.