Hair straightener and gyroscope: what they have in common

1. Step 1. Hair straightener — has part — Heating element. A heating element warms the straightener's plates.
2. Step 2. Heating element — is part of — Washing machine. A heating element.
3. Step 3. Washing machine — has part — Ball bearing. Drum bearings.
4. Step 4. Ball bearing — is part of — Gyroscope. Legs.

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