英语词汇“roof stringer”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	roof stringer
释义	roof stringer roof stringer [′rüf ‚striŋ·ər] (mining engineering) A lagging bar running parallel with the working place above the header in a weak or scaly top in narrow rooms or entries which have short life.
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