refracted waverefractionrefraction errorrefraction lossrefractive indexrefractive modulusrefractivityrefractometerrefractoryrefractory metalrefractory metalsrefrangiblerefrectivityrefreshrefresh cyclerefrigerateregenerateregenerationregeneration controlregeneration period scan periodregenerativeregenerative amplifierregenerative detectorregenerative receiverregenerative repeaterreggia spencer phase shifterregilateregimeregionregional channelregisterregister controlregister fileregister lengthregister markregistration registerregistryregolating effectregularregulated power supplyregulatingregulating circuitregulating speedregulating unitregulating windingregulationregulatorreignitionreignition voltage restriking voltagereinartz crystal oscillator
