Alloy wheel and smart meter: what they have in common

1. Step 1. Alloy wheel — is a kind of — Wheel. A wheel.
2. Step 2. Wheel — is part of — Lunokhod. Wheels.
3. Step 3. Lunokhod — has part — Solar panel. A solar panel.
4. Step 4. Solar panel — is part of — CubeSat. Power comes from solar panels.
5. Step 5. CubeSat — has part — Microcontroller. On-board electronics.
6. Step 6. Microcontroller — is part of — Smart meter. A microcontroller does the metering.

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