retarding admixtureretarding agentretarding basinretarding forceretarding reservoirretemperingretentionretention curveretention timereticuleretortretractionretraction rateretread processretreading wavefrontretrograde precessionretrogressionretrogressive landslidereturn flowreturn periodreturn seepagereturn stairreturn to storereturn wallreturned powerreturned sludgerevealreversal rulereverse archreverse curvaturereverse curvereverse curve between parallel tangentsreverse curve signreverse flowreverse polarityreverse turn signreversiblereversible creepreversible elbowreversible lanerevetmentrevibrationrevised estimaterevised sectionrevolutionrevolution per minuterevolving distributorreynolds lower critical numberreynolds numberreynolds upper critical number
