gas drainage roadway 中文意思是什麼
gas drainage roadway
解釋
排瓦斯巷道-
Gas drainage roadway
排瓦斯巷道 -
Effectiveness of outburst - prevention measures of combining gas pre - drainage by highly - located roadway in roof with deep - hole loosening blasting
頂板高位巷預抽與深孔松動爆破相結合防突出措施效果 -
Application of roadway gas drainage by first suction and then discharge in tucheng mine
先抽后啟排放巷道瓦斯法在土城礦的應用 -
Application on gas drainage technology in high level drainage roadway of coal roof
煤層頂板高抽巷瓦斯抽放技術的應用
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