婷婷中文在线|久热青草香蕉天堂欧美|日韩一二三四不卡视频在线播放网站|av伊人蜜桃

OA
中文EN0531-82721303
ABOUT HMR公司概況
IntroduceChairman SpeechDevelopment CourseCorporate Culture
Your Current Position:Home-Culture-Character Style

Sun Chunbao

Professor, doctoral supervisor

Director of Department of mineral processing engineering, Beijing University of science and technology, member of Mineral Processing Committee of China Society of metals, member of national gold Standardization Technical Committee.