Evacuation tip 1970-01-01
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Extended interaction oscillator 1970-01-01
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Field emission gun 1970-01-01
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Field emitter array 1970-01-01
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Fleming valve 1970-01-01
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GU-50 1970-01-01
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Getter 1970-01-01
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Glowing plate 1970-01-01
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Grid-leak detector 1970-01-01
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Grid dip oscillator 1970-01-01
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Gyrotron 1970-01-01
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HT (vacuum tube) 1970-01-01
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Hot cathode 1970-01-01
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Image intensifier 1970-01-01
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Inductive output tube 1970-01-01
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JJ Electronic 1970-01-01
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KT66 1970-01-01
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KT88 1970-01-01
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KT90 1970-01-01
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Klystron 1970-01-01
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