英语词汇“drop-out ceiling”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	drop-out ceiling
释义	drop-out ceiling drop-out ceiling A suspended ceiling system having listed translucent or opaque, heat-sensitive panels; when subject to heat, these panels drop from the suspension system, thereby exposing the sprinkler system installed above it.
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