http://www.flashcardexchange.com/tag/r-134a www.flashcardexchange.com: r-134a Flashcards en-us Mon, 28 May 2012 02:23:45 PDT Mon, 28 May 2012 02:23:45 PDT support@flashcardexchange.com 720 http://www.flashcardexchange.com/flashcards/view/429184 Study for the U.S. Environmental Protection Agency's Section 608 refrigerant technician certification core test. 2007-01-24 http://www.flashcardexchange.com/flashcards/view/429184