英语词汇“supplemental vertical exit”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	supplemental vertical exit
释义	supplemental vertical exit supplemental vertical exit An enclosed stair, ramp, or escalator providing means of egress to an area of refuge at another area near the street floor.
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