Chain mail and electric generator: what they have in common

1. Step 1. Chain mail — works like — Roller chain. Interlinked links — a flexible metal structure.
2. Step 2. Roller chain — is part of — Combine harvester. Chain drives power the working parts.
3. Step 3. Combine harvester — has part — Diesel engine. Self-propelled combines run on diesels.
4. Step 4. Diesel engine — is part of — Diesel locomotive. The diesel turns a generator.
5. Step 5. Diesel locomotive — has part — Electric generator. The generator powers the traction motors.

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