Earth embankment and diesel engine: what they have in common

1. Step 1. Earth embankment — is part of — Levee. An earth embankment.
2. Step 2. Levee — evolved into — Dam. A retaining structure.
3. Step 3. Dam — is part of — Hydroelectric power station. The dam creates the head of water.
4. Step 4. Hydroelectric power station — has part — Electric generator. Generators.
5. Step 5. Electric generator — is part of — Diesel locomotive. The generator powers the traction motors.
6. Step 6. Diesel locomotive — has part — Diesel engine. The diesel turns a generator.

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