英语词汇“class-a door”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典-现代词典

单词	class-a door
释义	class-A door class-A door A door having a 3-hr fire-endurance rating, suitable for use as a closure in a class-A opening.
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class-A door