英语词汇“half-header”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	half-header
释义	half-header half-header [′haf ¦hed·ər] (mining engineering) A large cap piece; used by sawing a header in two and placing, generally, two timbers under the half header on one side of the haulage, with the end extending over the haulage.
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