The result shows that the coal broken degree is the main token factor for measuring the oxygen free-diffusing characteristics in coal.
结果表明：煤的破碎程度是氧在煤体表面扩散作用的主要度量因子；
The result shows that the coal broken degree is the main token factor for measuring the oxygen free-diffusing characteristics in coal.
结果表明：煤的破碎程度是氧在煤体表面扩散作用的主要度量因子；
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