Taking 2-2 coal seam of Halagou coal mine for example,laneway system and its interrelated parameters with short-wall and continuous mining machine in Shendong mining area were introduced.

 
  • 以哈拉溝煤礦2-2煤層的開(kāi)采系統為例,介紹了神東礦區連續采煤機短壁式機械化開(kāi)采的巷道系統及其相關(guān)參數。
今日熱詞
目錄 附錄 查詞歷史
国内精品美女A∨在线播放xuan