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G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
G01R31/24—Testing of discharge tubes
G01R31/25—Testing of vacuum tubes
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FR865989D1940-06-031940-06-03Appareil combiné pour contrôles et mesures de matériel et mise au point d'appareils radioélectriques
ExpiredFR865989A
(fr)