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Analog clocks & watches, washing machines, transmissions, bicycles (technically a machine for its day), the early printing press, the cotton gin, other 19th century industrial machinery, cranes, and pretty much anything else that physically moves and isn't wholly digital.

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โˆ™ 11y ago
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Anonymous

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โˆ™ 4y ago

wheel and axle screw

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Q: What machines have gears?
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