英语词汇“jackbit”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	jackbit
释义	jackbit jackbit [′jak‚bit] (design engineering) A drilling bit used to provide the cutting end in rock drilling; the bit is detachable and either screws on or is taper-fitted to a length of drill steel. Also known as ripbit.
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