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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
H01J9/40—Closing vessels
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Engineering & Computer Science
(AREA)
Manufacturing & Machinery
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FR481002D1916-02-191916-02-19
Improvements to electric lamps
ExpiredFR481002A
(en)