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2. 1,1,1,2-Tetrafluoroethane - Wikipedia

   en.wikipedia.org/wiki/1,1,1,2-Tetrafluoroethane

   1,1,1,2-Tetrafluoroethane (also known as norflurane (), R-134a, Klea 134a, Freon 134a, Forane 134a, Genetron 134a, Green Gas, Florasol 134a, Suva 134a, HFA-134a, or HFC-134a) is a hydrofluorocarbon (HFC) and haloalkane refrigerant with thermodynamic properties similar to R-12 (dichlorodifluoromethane) but with insignificant ozone depletion potential and a lower 100-year global warming ...

3. R127/R134 (New York City Subway car) - Wikipedia

   en.wikipedia.org/wiki/R127/R134_(New_York_City...

   The R127 and R134 are New York City Subway cars purpose-built by Kawasaki Heavy Industries [1] in Kobe, Japan for work train service. The ten R127s, numbered EP001 to EP010, were built in 1990–1991 while the eight R134s, numbered EP011 to EP018, were built in 1994–1996.

4. Air conditioning - Wikipedia

   en.wikipedia.org/wiki/Air_conditioning

   The units went on sale in 1932 at US$10,000 to $50,000 (the equivalent of $200,000 to $1,100,000 in 2023.) [20] A year later, the first air conditioning systems for cars were offered for sale. [34] Chrysler Motors introduced the first practical semi-portable air conditioning unit in 1935, [35] and Packard became the first automobile ...