Rotary vane rotor and solar panel: what they have in common

1. Step 1. Rotary vane rotor — is part of — Vacuum pump. Vanes cut off portions of gas.
2. Step 2. Vacuum pump — has part — Stator. A cylindrical chamber.
3. Step 3. Stator — is part of — Electric generator. The stationary part with the windings.
4. Step 4. Electric generator — includes — Solar panel. A solar panel also generates electricity — from light rather than rotation.

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