The largest risk in coal mining is the collapse of the mine.
出现的最大危险就是巷道崩坍。
I pledge to risk my life for those who don't care about mine "?"
“我发誓愿为那些不在乎我的人冒险陪上我的性命”吗？
The quantitative evaluation method of the coal mine fire risk is discussed.
探讨了煤矿火灾危险的定量评价。
The quantitative evaluation method of the coal mine fire risk is discussed.
探讨了煤矿火灾危险的定量评价。
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