outburst coal

 
  • 突出煤层

outburst coal的用法和样例:

例句

  1. Grave protrusion coal seam tunnelling hydraulic cutting protrusion-dispelling measures is a new technology in the world.
    严重突出煤层掘进水力掏槽防突措施在国际上是一种防突新技术。
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