This paper presents the improvement and practical experience of jig in Nan Shan coal preparation plant ,and also made a analysis on concrete problem.

　
英 美
  • 介紹了南山選煤廠(chǎng)對跳汰機進(jìn)行改造的實(shí)踐經(jīng)驗，對實(shí)際工作中具體問(wèn)題進(jìn)行了分析說(shuō)明。
今日熱詞
目錄 附錄 查詞歷史
国内精品美女A∨在线播放xuan