structure of the skiatron

line font drawing diagram text sketch cartoon document brand vehicle artwork map circle wing wheel skiatron strucutre structure vector cathode ray tube crt cathodochromic screen electron beam isolated white heating erasing magenta potassium chloride mica area color dark trace device display fan form layer marker material oscilloscope path pattern phosphor photograph physic plate projection property radar reversible photochromism schmidt corrector scotophor spherical mirror spot station surface target television tenebrescence tungsten warm recording wwii skiatron