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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
H01J9/38—Exhausting, degassing, filling, or cleaning vessels
H01J9/385—Exhausting vessels
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FR578844D1924-03-181924-03-18Perfectionnements aux tubes à vide électriques
ExpiredFR578844A
(fr)