英语词汇“medium rank coal”的翻译、意思、用法、释义-英汉汉英双解词典

词汇	medium rank coal
释义	medium rank coal 中煤阶煤；国际煤层煤分类中,2.0%,且含水无灰基高位发热量不低于24MJ/kg的煤。
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