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D APP ET DE LAMPES ELECTR SOC
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D APP ET DE LAMPES ELECTR SOC
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Publication of FR863812ApublicationCriticalpatent/FR863812A/fr
H01J5/08—Vessels; Containers; Shields associated therewith; Vacuum locks provided with coatings on the walls thereof; Selection of materials for the coatings
FR863812D1939-10-091939-10-09Perfectionnements relatifs aux lampes électriques pour défense passive
ExpiredFR863812A
(fr)