英语词汇“incompetent rock”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	incompetent rock
释义	incompetent rock incompetent rock [in′käm·pəd·ənt ′räk] (engineering) Soft or fragmented rock in which an opening, such as a borehole or an underground working place, cannot be maintained unless artificially supported by casing, cementing, or timbering.
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