英语词汇“preparatory work”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	preparatory work
释义	preparatory work preparatory work [′prep·rə‚tȯr·ē ‚wərk] (mining engineering) Various excavations within a deposit so that actual mining can begin; includes inclines, drives between levels, crosscuts, and chutes.
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