Press frame and smart meter: what they have in common

1. Step 1. Press frame — is part of — Screw press. A rigid frame.
2. Step 2. Screw press — is part of — Gutenberg printing press. Gutenberg adapted the screw press known from pressing grapes.
3. Step 3. Gutenberg printing press — works like — Printer. A printer is a personal printing press: it transfers an image onto paper.
4. Step 4. Printer — has part — Microcontroller. A controller processes the print job.
5. Step 5. Microcontroller — is part of — Smart meter. A microcontroller does the metering.

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