Aimed at the shortcomings of coalface passing through fault as low speed, low efficiency and low-quality coal and so on, a new technique was suggested.

 
  • 摘要針對采煤工作面過(guò)斷層速度慢、效率低且影響煤質(zhì)等缺點(diǎn),提出工作面快速無(wú)矸石過(guò)斷層清潔開(kāi)采技術(shù)。
今日熱詞
目錄 附錄 查詞歷史
国内精品美女A∨在线播放xuan