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WebbR-427A is a zeotropic HFC blend which has been designed to replace R-22 (HCFC) by conversion of existing systems or for use in new systems. It may be used in direct … Webb22 juli 2014 · Raytheon was founded as the American Appliance Company in 1922 by Laurence Marshall and Vannevar Bush who had been roommates at Tufts University engineering college. The scientist Charles Smith also joined them in establishing the company in Cambridge, Massachusetts. Initially the company focused on refrigeration … WebbFluide frigorigène de remplacement à base d’hydrofluorocarbures, une alternative au R-12. Les techniciens en automobile se fient au Freon™ 134a (R-134a), le fluide frigorigène de remplacement du R-12 à base d’hydrofluorocarbures (HFC) sans danger pour la couche d’ozone. Freon™ 134a est la référence pour de nombreux climatiseurs ... shoe stores in jupiter fl