recursive queryrecyclingred eyered restorerred video voltageredgunredistributionreducedreduced highreduced instruction set computerreductionreduction of noiseredundancyredundaney checkredundantredundant digitredundant operationredundant reductionreed relayreed relay magnetic reed relayreed switch magnetic reed switchreelreentrantreentrant resonatorrefeneratereferencereference axisreference black levelreference conditionsreference couplingreference currentreference dipolereference directionreference earthreference frequencyreference inputreference input elementreference junctionreference levelreference linereference modelreference nodereference noisereference phasereference pointreference pressurereference resistancereference stationreference stimulusreference temperature
