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Sprocket
01
tooth on the rim of gear wheel
Example
Motorcycles rely on a sprocket system to transfer power from the engine to the rear wheel.
The camshaft in an engine is often driven by a sprocket, regulating the timing of valve movements.
The bicycle 's rear wheel is connected to the chain and sprocket assembly, facilitating smooth pedaling.
03
roller that has teeth on the rims to pull film or paper through
Example