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

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R value

R value n. the heat-insulating property of a building material.

1969 U.S. Patent 3,436,534 7 A direct readout electrical analog system,..there being means..to readout R value according to the relation R = X/K wherein X is the thickness of at least one of the refractory strata, K is the thermal conductivity and R is thermal resistance thereof.

1975 Athens (Ohio) Messenger 9 May 14/2 Insulation is rated by its resistance to heat flow. This is called its R value (R for resistance).

1988 Harrowsmith Jan. 86/3 A typical double-glazed window with an R-value of 2 loses heat at least 10 times faster than the moderately well-insulated wall that surrounds it.

1999 BackHome Mar. 29/1 Fiberglass insulation..will lose much of its R-value if it gets wet.

extracted from Rn.

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单词	r value
释义	> as lemmas R value R value n. the heat-insulating property of a building material. Π 1969 U.S. Patent 3,436,534 7 A direct readout electrical analog system,..there being means..to readout R value according to the relation R = X/K wherein X is the thickness of at least one of the refractory strata, K is the thermal conductivity and R is thermal resistance thereof. 1975 Athens (Ohio) Messenger 9 May 14/2 Insulation is rated by its resistance to heat flow. This is called its R value (R for resistance). 1988 Harrowsmith Jan. 86/3 A typical double-glazed window with an R-value of 2 loses heat at least 10 times faster than the moderately well-insulated wall that surrounds it. 1999 BackHome Mar. 29/1 Fiberglass insulation..will lose much of its R-value if it gets wet. extracted from Rn. < as lemmas
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