Riveted mail rings and truck: what they have in common

1. Step 1. Riveted mail rings — is part of — Chain mail. Riveted ends of the rings.
2. Step 2. Chain mail — works like — Roller chain. Interlinked links — a flexible metal structure.
3. Step 3. Roller chain — is part of — Combine harvester. Chain drives power the working parts.
4. Step 4. Combine harvester — has part — Diesel engine. Self-propelled combines run on diesels.
5. Step 5. Diesel engine — is part of — Truck. A diesel engine.

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