coal mining

　
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  • 煤礦開(kāi)采

coal mining的用法和樣例：

例句

  1. The utilization of CMM drained in coal mining is quite difficult because it contains plenty of air.
    煤礦開(kāi)采時(shí)所抽采的含空氣的煤層氣難以得到很好的利用。
  2. With the increase of the depth of coal seams mined, rock bursts will easily occur in gateways with fully-mechanized sublevel caving mining.
    摘要隨著(zhù)煤礦開(kāi)采深度增加，綜放開(kāi)采回采巷道易發(fā)生沖擊地壓危害。
  3. Coal mining has always been a dangerous occupation.
    采煤向來(lái)是一種危險職業(yè)。
  4. We have raised the coal output by using better mining methods.
    我們利用更好的采煤法增加了煤炭產(chǎn)量。
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