Row of spindles and truck: what they have in common

1. Step 1. Row of spindles — is part of — Spinning jenny. A row of vertical spindles.
2. Step 2. Spinning jenny — evolved from — Spinning wheel. Many spindles driven by one wheel.
3. Step 3. Spinning wheel — has part — Belt drive. The wheel is linked to the spindle by a cord.
4. Step 4. Belt drive — is part of — Combine harvester. Belt drives.
5. Step 5. Combine harvester — has part — Diesel engine. Self-propelled combines run on diesels.
6. Step 6. Diesel engine — is part of — Truck. A diesel engine.

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