英语词汇“r-value”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	r-value
释义	WordReference Random House Unabridged Dictionary of American English © 2024 R-val•ue (är′val′yo̅o̅),USA pronunciation n. Buildinga measure of the resistance of an insulating or building material to heat flow, expressed as R-11, R-20, and so on; the higher the number, the greater the resistance to heat flow. Cf. U-value. R, symbol for resistance 1945–50
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