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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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FR565121D1923-04-141923-04-14Perfectionnements à la fabrication des tubes à vide à trois électrodes
ExpiredFR565121A
(fr)