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Weifang Better Heavy Machinery Science and Technology Co., Ltd.
Zhongke-Lian Sheng (Shenzhen) Technology Co., Ltd.
Hongkong Joint Stars Group Limited
Junhong Electronic & Technology Co., Ltd.
Zhengzhou Nanbei Instrument Equipment Co., Ltd.
Guangzhou DENS Technology Co., Limited
Hunan Puqi Geologic Exploration Equipment Institute (Common Partnership)
3rd Eye Electronics Co., Ltd.
Hangzhou Dooren Technology Co., Ltd.
Beijing Topsky Century Holding Co., Ltd.