英语词汇“rider coal seam”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典-现代词典

单词	rider coal seam
释义	rider coal seam rider coal seam [′rīd·ər ¦kōl ‚sēm] (mining engineering) In a coal mine, a small coal seam above the main seam. Also known as rider coal.
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