“incompetent rock”的概念、定义、翻译、参考文献-科学参考

单词	incompetent rock
释义	incompetent rock [in`käm·pǝd·ǝnt `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.
随便看	subterranean stream subtilin subtracted time subtracter subtraction subtraction sign subtractive primaries subtractive process subtractor subtrahend subtree Subtriquetridae subtropic subtropical anticyclone Subtropical Convergence subtropical cyclone subtropical easterlies subtropical easterlies index subtropical forest subtropical high subtropical high-pressure belt subtropical westerlies subulate Subulitacea Subuluridae

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