英语词汇“alum shale”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	alum shale
释义	Definition of alum shale in English: alum shale noun An iron-rich shale or slate containing alum formed by weathering of the clay component. Origin Mid 18th century; earliest use found in John Smeaton (1724–1792), civil engineer. Definition of alum shale in US English: alum shale noun An iron-rich shale or slate containing alum formed by weathering of the clay component. Origin Mid 18th century; earliest use found in John Smeaton (1724–1792), civil engineer.
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Definition of alum shale in English: