coal dust index
... 煤尘沉降 dust precipitation 煤尘指数 coal dust index 煤尘 煤粉 coaldust ...
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煤尘爆炸指数 explosive index of coal dust
·2,447,543篇论文数据，部分数据来源于NoteExpress
据统计全国煤矿中，具有煤尘爆炸危险的矿井占煤矿总数的60%以上，煤尘爆炸指数在45%以上的煤矿占16.3%。
According to national statistics, coal mines with coal dust explosion risks account for 60% of all coal mines, among which coal mines with explosion index over 45% accounting for 16.3%.
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