Drug-eluting coating and bicycle: what they have in common

1. Step 1. Drug-eluting coating — is part of — Stent. It prevents re-narrowing.
2. Step 2. Stent — uses — Angioplasty. It is placed during angioplasty.
3. Step 3. Angioplasty — uses — X-ray machine. Under X-ray guidance.
4. Step 4. X-ray machine — evolved into — CT scanner. Tomography from many images.
5. Step 5. CT scanner — has part — Ball bearing. The gantry turns on a bearing.
6. Step 6. Ball bearing — is part of — Bicycle. Ball bearings in the hubs and bottom bracket let the wheels and pedals spin easily.

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