Plansifter and fitness tracker: what they have in common

1. Step 1. Plansifter — is part of — Roller mill. Sieves that separate the milling products.
2. Step 2. Roller mill — has part — Electric motor. The roller drive.
3. Step 3. Electric motor — is used in — Electric unicycle. An electric unicycle's motor hides right inside the wheel.
4. Step 4. Electric unicycle — has part — Accelerometer. Tilt sensors.
5. Step 5. Accelerometer — is part of — Fitness tracker. A pedometer.

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