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