英语词汇“perforated facing”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	perforated facing
释义	perforated facing perforated facing In an acoustical assembly, any flexible or rigid perforated sheet or board designed as a protective surface allowing free access of sound to an underlying layer of sound-absorptive material.
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