mine calamity

常见例句

The coal seam methane is a source of coal mine gas calamity, and also a clear energy resources.
甲烷是强烈的温室气体，煤层甲烷是煤矿瓦斯灾害之源，也是洁净的能源。
Safety accidents caused by coal-mine natural calamity has seriously negative influence on the safety production and economic results of coal mine.
矿井自然灾害引发的安全事故严重影响煤矿的安全生产与经济效益。
Do not or discount execute the command and etc related is one of the fundamental reasons to cause the frequent mine calamity in the important State-Owned Coal Mine in Shanxi Province.
有令不行或执行中打折扣等等相关，是致使山西国有重点煤矿矿难频繁发生的根本原因之一。