Reciprocal transformations associated with admitted conservation laws Worktop Refrigerators were originally used to derive invariance properties in non-relativistic gasdynamics and applied to obtain reduction to tractable canonical forms.They have subsequently been shown to have diverse physical applications to nonlinear systems, notably in the analytic treatment of Stefan-type moving boundary problem and in linking inverse scattering systems and integrable hierarchies in soliton theory.Here,invariance under classes of reciprocal transformations in relativistic gasdynamics HIGH WHEY CHOCOLATE is shown to be linked to a Lie group procedure.