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According to ASHRAE standard 34, the R-number of a chemical refrigerant is assigned systematically according to its molecular structure and has between two and four digits. If there are carbon -carbon multiple bonds , there are four digits in all: the number of these bonds is the first digit and the number of carbon atoms minus one (C-1) is next.
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Names are drawn in order from predetermined lists. For tropical cyclones, names are assigned when a system has one-, three-, or ten-minute winds of more than 65 km/h (40 mph). Standards, however, vary from basin to basin.
This list contains acronyms, initialisms, and pseudo-blends that begin with the letter R. For the purposes of this list: acronym = an abbreviation pronounced as if it were a word, e.g., SARS = severe acute respiratory syndrome , pronounced to rhyme with cars
This is a list of diseases starting with the letter "R". Ra. Rab–Rai; Ram–Ray; Rab–Rai. Rabies; Rabson–Mendenhall syndrome; Radial defect Robin sequence ...
A global, multilingual list of rhythm and blues and contemporary R&B musicians recognized via popular R&B genres as songwriters, instrumentalists, vocalists, mixing engineers, and for musical composition and record production.
The following page is an alphabetical section from the list of PC games. R. Name Developer Publisher Genre(s) Operating system(s) Date released Rage: id Software ...
This is a list of players who have appeared in at least one regular season or postseason game in the National Football League (NFL) or American Football League (AFL) and have a last name that starts with "R". [a] This list is accurate through the end of the 2023 NFL season.