loosening blasting 中文意思是什麼

loosening blasting 解釋
松動爆破
  1. 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
分享友人