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Gas - or dampfgefuelltes electrical discharge, which drives a long service life of the device shown in fig..) with heatable oxide cathode made of nickel and a nickel coating is applied to the electron emissive
Gas - or dampfgefuelltes electrical discharge, which drives a long service life of the device shown in fig..) with heatable oxide cathode made of nickel and a nickel coating is applied to the electron emissive