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Cathodes roehre, in which grating or anode or both in the electron beam path are arranged in such a way that, as seen from the cathode, parts of the grating and the anode alternate with one another
Cathodes roehre, in which grating or anode or both in the electron beam path are arranged in such a way that, as seen from the cathode, parts of the grating and the anode alternate with one another
