Brake pad and transformer: what they have in common

1. Step 1. Brake pad — is part of — Brake caliper. Pads.
2. Step 2. Brake caliper — is part of — Car brake. A caliper.
3. Step 3. Car brake — is part of — Electric car. Besides regeneration, ordinary friction brakes are needed.
4. Step 4. Electric car — uses — Charging station. It charges at charging stations.
5. Step 5. Charging station — uses — Electrical grid. Powered from the grid.
6. Step 6. Electrical grid — has part — Transformer. Transformer substations.

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