"Absorption refrigerator" . . . . "absorption chiller" . . . . . . "absorption model" . . "absorption" . . "absorption refrigerator" . "adsorption chiller" . "vapor-absorption chillers" . "vapor absorption" . . "water-spray absorption refrigeration" . "absorption cooler" . "absorption refrigeration" . . "kerosene refrigerator" . . "vapour absorption machine" . . . . . . "absorption technology" . "Vapor-absorption refrigeration" . "Absorption refrigerator" . . "absorption chillers" . . . .