英语词汇“brace head”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	brace head
释义	brace head brace head [′brās ‚hed] (engineering) A cross handle attached at the top of a column of drill rods by means of which the rods and attached bit are turned after each drop in chop-and-wash operations while sinking a borehole through overburden. Also known as brace key.
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