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US3566179A
(en)
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Cathode and heater constructions and mountings in electron discharge devices
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(en)
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Vacuum tube
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(enrdf_load_stackoverflow)
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(enrdf_load_stackoverflow)
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BE401178A
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EP0200641A1
(fr)
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Pompe ionique à courant proportionnel au débit
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(enrdf_load_stackoverflow)
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(enrdf_load_stackoverflow)
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BE366129A
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