frequency separationfrequency separation multiplierfrequency separatorfrequency shiftfrequency shift converterfrequency shift keyingfrequency shiftingfrequency slope modulationfrequency spectrumfrequency splittingfrequency stabilityfrequency stabilizationfrequency stabilizerfrequency standardfrequency swingfrequency synthesizerfrequency to voltage converterfrequency tolerancefrequency transformationfrequency transformerfrequency triplerfrequency tuningfrequency type telemeterfrequency valuefresnel diffractionfresnel lensfresnel regionfresnel zonefresnel zone platefresnel zone reflectorfrictionfriction bondingfriction coefficientfriction contactfriction factorfriction forcefriction lossfrictionalfrictional electricityfrictional forcefrictional resistancefringe areafringe effectfringe howlfringing fieldfritfroced oscillation forced vibrationfront contactfront endfront end fabrication
