澳门六合彩开奖记录

Gao Youjin

Doctor, Professor level senior engineer, Doctoral supervisor, Distinguished professor at Henan Polytechnic University, Director of the Key Laboratory of Intelligent Mining Technology and Equipment in Henan Province, President of the Intelligent Mining Research Institute at Henan Polytechnic University, and Academic and Technical Leader in Henan Province.

Research direction: Coal mine comprehensive mining technology and equipment, coal mine intelligent mining technology and equipment

Email: [email protected]