Electric generator and cannon: what they have in common

1. Step 1. Electric generator — is part of — Nuclear power plant. Generators.
2. Step 2. Nuclear power plant — has part — Steam turbine. Steam turns the turbines — as at a thermal station.
3. Step 3. Steam turbine — is part of — Aircraft carrier. Turbines (powered by a reactor on nuclear carriers).
4. Step 4. Aircraft carrier — evolved from — Ironclad. The first aircraft carriers were converted from battleships and cruisers.
5. Step 5. Ironclad — has part — Cannon. Artillery.

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