首页>
外国专利>
Circuit for ignition a discharge roehre with the invention is composed of mercury of existing main cathode by means of a hilfsgluehkathode and richter roehre for the application of this circuit
Circuit for ignition a discharge roehre with the invention is composed of mercury of existing main cathode by means of a hilfsgluehkathode and richter roehre for the application of this circuit