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2013-05-23 12:21
求翻译：This dust is a result of degradation caused partly by the escape of moisture from the coal and partly by the oxidation of mineral matter, particularly iron sulfide, contained in cleavage veins of coals and similar fuels. Another cause for dustproduction, which occurs in both high rank and low rank coals, is a high degr是什么意思？ 待解决
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This dust is a result of degradation caused partly by the escape of moisture from the coal and partly by the oxidation of mineral matter, particularly iron sulfide, contained in cleavage veins of coals and similar fuels. Another cause for dustproduction, which occurs in both high rank and low rank coals, is a high degr
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