Anchor flukes and electric fan: what they have in common

1. Step 1. Anchor flukes — is part of — Anchor. They dig into the ground.
2. Step 2. Anchor — uses — Universal gravitation. Weight and grip on the seabed.
3. Step 3. Universal gravitation — is used in — Water tower. Pressure from height.
4. Step 4. Water tower — has part — Centrifugal pump. Filled by pumps.
5. Step 5. Centrifugal pump — has part — Impeller. The impeller accelerates the liquid.
6. Step 6. Impeller — is part of — Electric fan. A fan's blades are an impeller that pushes the air.

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