英语词汇“wall rock”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	wall rock
释义	WordReference Random House Unabridged Dictionary of American English © 2024 wall′ rock′, [Mining.] Geology, Miningthe rock forming the walls of a vein. 1855–60, American.
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