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	Vacuum Tubes 1943 Educational Documentary WDTVLIVE42 - The Best Documentary Ever (Friedrich Moore) View
	Vacuum Tubes (1943) (Public Domain Stuff) View
	Vacuum Tubes - The Triode u0026 The Multipurpose Tubes - 1943 US Army Training Film (Electrical Superintendent) View
	Vacuum Tubes - Triode And Multi-Purpose Tubes (1942) (A/V Geeks 16mm Films) View
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	Do vacuum tubes have a future (Paul McGowan, PS Audio) View
	Vacuum Tubes: What Are They u0026 What Do They Do...The 10 Minute Crash Course (Rosie O'Kelly) View
	Electrons on Parade - How Vacuum Tubes were made, worked and used in 1941 (AWA Communication Technologies Museum) View
	The Numerically Controlled Machining Center 1950s Educational Documentary WDTVLIVE42 - The Best Docu (Alexandra Terra) View
	How a Vacuum tube works (littlewaltertubeamps) View