Electric bicycle and refrigerator: what they have in common

1. Step 1. Electric bicycle — has part — Hub motor. A hub motor or a mid-drive motor.
2. Step 2. Hub motor — uses — Electromagnetism. A hub motor is an electric motor.
3. Step 3. Electromagnetism — is used in — Circuit breaker. An electromagnetic trip.
4. Step 4. Circuit breaker — uses — Bimetallic strip. The thermal trip is a bimetal strip.
5. Step 5. Bimetallic strip — is part of — Thermostat. A classic thermostat is bimetallic.
6. Step 6. Thermostat — is part of — Refrigerator. A thermostat.

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