英语词汇“black oil”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	black oil
释义	black oil black oil [¦blak ′ȯil] (materials) Low-grade, black petroleum oil used to lubricate slow-moving or rough-surfaced machinery where high-grade lubricants are impractical or too expensive.
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