thermionic diode thermionic emission thermionic generator thermionic tube thermionic voltmeter thermistor thermistor gauge thermistor head thermit thermite thermite bomb thermite collar thermite joint thermite welding thermit joint thermit metal thermit mould thermit welding thermo-chemical refining thermochemistry |
thermionic diode вакуумен диод Търсената дума е намерена |