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Publication of FR888921ApublicationCriticalpatent/FR888921A/fr
H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
H01J9/40—Closing vessels
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FR888921D1942-08-141942-08-14Procédé et dispositif pour fermer les queusots de lampes à vide
ExpiredFR888921A
(fr)