Hub gear and nuclear reactor: what they have in common

1. Step 1. Hub gear — is a kind of — Planetary gear. A planetary gear.
2. Step 2. Planetary gear — is part of — Wind turbine. A gearbox raises the speed.
3. Step 3. Wind turbine — has part — Electric generator. A generator.
4. Step 4. Electric generator — is part of — Nuclear power plant. Generators.
5. Step 5. Nuclear power plant — has part — Nuclear reactor. The reactor heats the coolant.

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