Inflatable catheter balloon and solar panel: what they have in common

1. Step 1. Inflatable catheter balloon — is part of — Catheter. It inflates and holds the catheter in place.
2. Step 2. Catheter — is made of — Polyvinyl chloride (PVC). Plastic catheters.
3. Step 3. Polyvinyl chloride (PVC) — is material for — Payment card. The card is PVC.
4. Step 4. Payment card — has part — Integrated circuit. An EMV chip.
5. Step 5. Integrated circuit — is part of — Electronic calculator. A chip.
6. Step 6. Electronic calculator — has part — Solar panel. Many run on a solar cell.

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