保护层上风巷穿层钻孔抽采被保护层卸压瓦斯的试验研究

保护层上风巷穿层钻孔抽采被保护层卸压瓦斯的试验研究的英文翻译

基本释义

• Experimental Study of Gas Relief from Protected Seam by Gas Drainage through Crossing Holes in Upper Airway of Protective Seam