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A naval engineer trying to develop methods to stabilize ship equipment accidentally created a classic toy when he knocked over a steel spring and watched it walk down a stack of books. He started a company that introduced the walking spring as "Slinky" in November, 1945.

U.S. Naval Institute

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50,711 次观看 • 7 个月前 •via X (Twitter)

艺术教育科学技术

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