coal petrology and quality
coal petrology and quality
煤炭岩石学与质量
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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The paper studied the factors affected to strength of coke with coal quality, coal petrology, coal ash content and others.
从煤质、煤岩、煤灰成分等方面研究了影响焦炭强度的因素。
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