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Qu'est-ce (qui) est R-469A - définition
R-469A
MIXTURE USED AS A REFRIGERANT
R-469A is the name given to a refrigerant mixture. It is made up of 35% carbon dioxide (R-744), 32,5 % Difluoromethane (R-32) und 32,5 % Pentafluoroethane (R-125).
Ŕ
LETTER OF THE SLOVAK AND LOWER SORBIAN ALPHABETS
R with acute; R acute
Ŕ (minuscule: ŕ) is a letter of the Lower Sorbian and Slovak alphabets, Ukrainian Latin alphabet and Proto-Turkic orthography. It is formed from R with the addition of an acute.
R rotunda
![Calibri, included with [[Windows]] Vista and newer, also has an r rotunda.](https://commons.wikimedia.org/wiki/Special:FilePath/Calibri r rotunda.svg?width=200 "Calibri, included with [[Windows]] Vista and newer, also has an r rotunda.")
![Example of ''etc.'' typeset with ''r rotunda'' in a [[Fraktur]] typeface](https://commons.wikimedia.org/wiki/Special:FilePath/Et cetera r rotunda.svg?width=200 "Example of ''etc.'' typeset with ''r rotunda'' in a [[Fraktur]] typeface")
![Geneva]], included with [[MacOS]].](https://commons.wikimedia.org/wiki/Special:FilePath/Geneva r rotunda.png?width=200 "Geneva]], included with [[MacOS]].")
![early printing]], from a page printed by [[Pablo Hurus]] in 1496 in Zaragoza, Spain. The sample includes the types for ''r rotunda'' (marked red), ordinary ''r'' (marked green), and Tironian ''et'' (marked blue).](https://commons.wikimedia.org/wiki/Special:FilePath/Pablo-Hurus-Zaragoza-1496-annotated.png?width=200 "early printing]], from a page printed by [[Pablo Hurus]] in 1496 in Zaragoza, Spain. The sample includes the types for ''r rotunda'' (marked red), ordinary ''r'' (marked green), and Tironian ''et'' (marked blue).")
![fonts]]](https://commons.wikimedia.org/wiki/Special:FilePath/R rotunda in different fonts.svg?width=200 "fonts]]")
HISTORICAL VARIANT OF THE LATIN LETTER R
Half r; R Rotunda; Ꝛ; Rounded r; Ꝝ
The r rotunda ⟨ ꝛ ⟩, "rounded r", is a historical calligraphic variant of the minuscule (lowercase) letter Latin r used in full script-like typefaces, especially blackletters.
