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This Fan Works Without Electricity 🤯🌀 (100-Year-Old Tech)
Before electricity became common, engineers found a brilliant solution. A Swiss company, E. Paillard & Co., created a fully mechanical wind-up fan powered by a spring motor. ⚙️ How it works: • A tightly wound spring stores energy • Gears release energy slowly • Blades spin to create airflow 🌀 Key features: • No electricity or ...
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