不同煤种的镜质组的燃尽特性与其煤化程度有关；

For the different coals. the burn-out characteristics of the vitrinite group is related to the degree of its coal change;

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不同煤种的镜质组的燃尽特性与其煤化程度有关；

For the different coals. the burn-out characteristics of the vitrinite group is related to the degree of its coal change;

youdao