X-rays and centrifugal pump: what they have in common

1. Step 1. X-rays — is used in — CT scanner. A CT scanner shines X-rays around a circle.
2. Step 2. CT scanner — has part — Ball bearing. The gantry turns on a bearing.
3. Step 3. Ball bearing — is part of — Washing machine. Drum bearings.
4. Step 4. Washing machine — has part — Centrifugal pump. A drain pump.

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