Rotation axle and bicycle: what they have in common

1. Step 1. Rotation axle — is part of — Anemometer. A vertical axis.
2. Step 2. Anemometer — uses — Wind power. It is turned by the wind.
3. Step 3. Wind power — is used in — Wind turbine. Wind energy.
4. Step 4. Wind turbine — has part — Electric generator. A generator.
5. Step 5. Electric generator — is part of — Bike light with dynamo. A dynamo.
6. Step 6. Bike light with dynamo — is part of — Bicycle. A lamp.

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