国产片免费观看91,国产精品爽黄69天堂A片,国产一级a爱片在线观看,娇妻两根一起进3p视频,欧美亚洲国产高清在线,大香蕉在线视频直播国产,老翁h狠狠躁死你h,久久66热人妻偷产精品,国产成人精选视频欣赏网,在线综合欧美国产理论

The 2013 National Coal Preparation Academic Exchange Conference and the First Session of the Sixth Editorial Committee of Coal Preparation Technology, jointly organized by the Coal Preparation Professional Committee of the China Coal Society and the Editorial Department of Coal Preparation Technology, was held in Taiyuan, Shanxi Province from November 22 to 24, 2013. Han Wansong, Vice President of Guohua Technology, attended the conference.

The main content of the conference includes academic exchanges on coal preparation both domestically and internationally, a summary of the work of the 5th Editorial Committee of Coal Preparation Technology, and the work arrangements of the new (6th) Editorial Committee. Vice President Han Wansong read a paper titled "Research and Application of Energy Conservation, Efficiency Improvement, and Emission Reduction Heavy Media Coal Preparation Complete Technology" at the academic exchange meeting, and was appointed as a member of the Editorial Committee by the Editorial Department of Coal Preparation Technology for a period of five years.