refinerefinedrefineryrefinery gasrefining of oilreflectreflected lightreflectionreflection angelreflection coefficientreflection gratingreflection lawreflection of lightreflection planereflection spectrometryreflectorrefluxreflux columnreflux condenserreformatsky reactionreformingrefraction of lightrefractive indexrefractometerrefractory cementrefractory clayrefractory coatingrefractory enamelrefractory materialrefractory metalrefractory oxiderefrigerantrefrigerationregenerateregenerationregioselectivityregiospecificregular polymerreinforcementrelative densityrelative dielectric constantrelative errorrelative humidityrelative permitivityrelative precisionrelative solubilityrelative solvationrelative supersaturationrelative viscosityrelativistic
