Youtube activity of "Keri Szafir" (@KeritechElectronics) on "AT&T Tech Channel" channel.
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UCL8zV5R4c8hj_eWqEo4_-TA
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Keri Szafir
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@KeritechElectronics
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"ATu0026T Archives: A Modern Aladdin's Lamp, about vacuum tubes,1940"
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