R-value
زبان مبدأ: انگلیسی
ترجمه به فارسی
- واژهنامه · Merriam-Webster Collegiate Dictionary R-value Pronunciation: ' är- ˌ val-( ˌ )yü Function: noun Etymology: probably from thermal r esistance Date: 1948 : a measure of resistance to the flow of heat through a given thickness of a material (as insulation) with higher numbers indicating better insulating properties ― compare U-VALUE