seitchselectselectance adjacent channel attenuation second channle attenuationselectionselection checkselection fllodingselectiveselective absorptionselective calling systemselective diffusionselective fadingselective jammingselective repeatselective transmissionselectively doped ture heterostruc transistorselectivetyselectivityselectivity controlselectorselector pulseselector relayselector switch multiple contact switchseleniumselenuum rectifierselfself = quenched counter tubeself absorptionself adaptingself adjustingself alignedself balancingself biasself blasself checkingself complementself demagentizationself dischargeself energyself excitedself excited oscillatorself excitingself focused picture tubeself gealing capacitorself generatingself generating transducerself guidedself impedanceself inductanceself inductionself instructed carry