sparkspark arresterspark collspark gapspark gap generatorspark gap modulationspark gap modulatorspark ignitionspark spectrumspark suppressorsparkingsparrowspatialspatial coordinatesspatial filterspeakerspecspec markspecialspecial purpose computerspecificspecific conductivityspecific dielectric strengthspecific electronic chargespecific emisionspecific ionizationspecific ionization coefficientspecific permeability relative permeabilityspecific routinespecificationspecint 92spectspectraspectralspectral characteristicspectral colorspectral contrntspectral densityspectral nullspectral purityspectral quantum yieldspectral radiant intensityspectral selectivityspectral sensitivity characteristic spectral responsespectrographspectrometerspectrometryspectrophotometerspectrophotometric analysisspectroradiometer
