gyral |
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| navigate by keyword : 1900s alter bike diagram driven driving engine engineering gear gearsn gyral illustration mechanism others parts racing reference relation showing speed such tenspeed that toothed vehicle vintage wheel wheelsn works |
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| Vintage illustration diagram showing Gyral Gear. a toothed wheel that works with others to alter the relation between the speed of a driving mechanism such as the engine of a vehicle and the speed of the driven parts the wheels.
`a racing bike with ten-speed gears`
1900s reference to engineering. |
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