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Application filed by Philips NvfiledCriticalPhilips Nv
Publication of FI35498ApublicationCriticalpatent/FI35498A/fi
FI35498D1962-03-061962-03-06Katod till ett elektriskt urladdningsrör, vilken katods utsida består av medelst barium aktiverad jordalkalimetalloxid
FI35498A
(fi)