Bulldozer and electrical grid: what they have in common

1. Step 1. Bulldozer — has part — Hydraulic cylinder. The blade is raised by hydraulics.
2. Step 2. Hydraulic cylinder — is part of — Hydraulic brake. Wheel cylinders press on the shoes.
3. Step 3. Hydraulic brake — is used in — Car brake. Brake actuation.
4. Step 4. Car brake — is part of — Electric car. Besides regeneration, ordinary friction brakes are needed.
5. Step 5. Electric car — uses — Charging station. It charges at charging stations.
6. Step 6. Charging station — uses — Electrical grid. Powered from the grid.

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