Brake caliper and solar panel: what they have in common

1. Step 1. Brake caliper — is part of — Car brake. A caliper.
2. Step 2. Car brake — is part of — Electric car. Besides regeneration, ordinary friction brakes are needed.
3. Step 3. Electric car — has part — Inverter. An inverter powers the traction motor.
4. Step 4. Inverter — is part of — Solar power station. Inverters convert direct current into alternating current.
5. Step 5. Solar power station — has part — Solar panel. A field of panels.

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