英语词汇“assessment drilling”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	assessment drilling
释义	assessment drilling assessment drilling [ə′ses·mənt ‚dril·iŋ] (mining engineering) Drilling to fulfill the requirement that a prescribed amount of work be done annually on an unpatented mining claim to retain title. Also known as annual labor.
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