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Tube type list
3S4T - Vint'Elec - Vintage electronic tubes
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Automotive New Ford Escape Starter with 2.3L Engine 2005-2008 SA-963 SA-923 3S4T-11000-AB Car & Truck Parts
Tube type list
1956 Szarotka Vintage Dock Station Tube Radio in Excellent - Etsy
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Category:Pentodes - Wikimedia Commons
European production of new imported straight tube heat power electronic tubes 3S4T original packaging|packaging ups|packaging earringspackaging samsung - AliExpress