英语词汇“hollow-metal fire door”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	hollow-metal fire door
释义	hollow-metal fire door hollow-metal fire door A hollow-metal door fabricated of sheet steel, No. 20 gauge or heavier, and filled with an approved fire-proof insulating material.
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