The step-by-step, mechanical logic of old pinball machines
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Tilting, taking turns, and winning free games: the many tricks inside old pinball machines
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Playing Music on the Oldest Running Computer in America!
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O Mgjic do Chordal Hop - Ouça ao vivo
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Old pinball machines are amazingly complex
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Movies made sound with a light bulb: Sound-on-film
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The clever feature that makes cheap heaters safe — and why they're actually dangerous
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How Old Pinball Machines Are Professionally Restored | Restoration
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