Gold leaf foils and smart meter: what they have in common

1. Step 1. Gold leaf foils — is part of — Electroscope. They spread apart when charged.
2. Step 2. Electroscope — is made of — Gold. With leaves of gold leaf.
3. Step 3. Gold — is material for — Glucose meter. The strip electrodes are gold or carbon.
4. Step 4. Glucose meter — has part — Liquid-crystal display. A screen.
5. Step 5. Liquid-crystal display — is part of — Smart meter. A display.

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