英语词汇“semidull coal”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	semidull coal
释义	semidull coal semidull coal [′sem·i‚dəl ′kōl] (geology) A type of banded coal consisting mainly of clarodurain and durain, with from 40 to 21% bright ingredients such as vitrain, clarain, and fusain.
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