ring diering opening polymerizationring orientationring ring equilibrationring spinningrinsingripeningrollroll formingroll millrollingrolling processrolling shearrotating corerotational energyrotational isomeric staterotational moldingrotocurerotogravure inkrotor spinningrough approximationroughnessround bouttomrovingrow matrixrow nucleationrow orientationrubberrubber coatingrubber elastic materialsrubber likerubber liningrubber plunger moldingrudderrule of mixturesrunnerrunner lessrupturerupture stressrupture testrust inhibitorrust stains