英语词汇“closed frame”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	closed frame
释义	closed frame closed frame [¦klōzd ¦frām] (mining engineering) A mine support frame that is completely closed; especially in inclined shafts, it is used to protect all sides from rock pressure.
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