“introductory column”的概念、定义、翻译、参考文献-科学参考

单词	introductory column
释义	introductory column [¦in·trǝ¦dǝk·tǝ·rē `käl·ǝm] ^{MINING ENGINEERING} The highest and first column that is inserted in casing a borehole.
随便看	alluvial flat alluvial mining alluvial ore deposit alluvial plain alluvial slope alluvial soil alluvial terrace alluvial valley alluviation alluvion alluvium all-wave receiver all-weather aircraft all-weather airport all-weather fighter all-weather landing system all-weld-metal test specimen allyl- allylacetone allyl alcohol allylamine allyl bromide allyl cation allyl chloride allyl cyanide

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