roof of drift 中文意思是什麼
roof of drift
解釋
平巷頂板-
Practices on bolt, mesh, anchor and beam support in coal drift under unstable roof condition of cataclastic rock mass
不穩定頂板煤巷錨網索梁支護實踐 -
Roof supporting of thick coal drift in sitai mine
四臺礦厚煤層綜采順槽及切眼頂板支護問題探討 -
Analysis of bolting with wire mesh technology from roof fall of letting gas drift
從排放瓦斯巷道冒頂事故分析錨網支護工藝 -
Anchor belt net and cable support technique in coal drift of combined roof with coal
含煤復合頂板煤巷錨帶網索梁支護技術
分享友人