“wellhole”的概念、定义、翻译、参考文献-科学参考

单词	wellhole
释义	wellhole [`wel´hōl] ^{MINING ENGINEERING} 1. A large-diameter vertical hole used in quarries and opencast pits for taking heavy explosive charges in blasting. 2. The sump, or portion of a shaft below the place where skips are caged at the bottom of the shaft, in which water collects.
随便看	borderline psychosis borderline syndrome border-punched card Bordetella Bordini effect bore boreal boreal forest Boreal life zone bore axis bore diameter bore evacuation bore evacuator bore expansion borehole borehole bit borehole logging borehole mining borehole survey Borel measurable function Borel measure Borel set Borel sigma algebra bore premature borer

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