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Hvac Training Videos. Смотреть видео: HVAC Training Basics For New Technicians And Students Refrigeration Cycle, HVAC Training Basics For New Techs Gauges Pressures Temps Check The Charge, HVAC Apprenticeship Class Refrigeration Cycle Superheat Subcooling Saturation Parts AC Heat, Explaining Superheat And Subcooling To Your Apprentice.