Hollow quill barrel and solar panel: what they have in common

1. Step 1. Hollow quill barrel — is part of — Quill pen. A hollow shaft holds the ink.
2. Step 2. Quill pen — uses — Ink. It writes with ink.
3. Step 3. Ink — is used in — Printer. It prints with ink.
4. Step 4. Printer — has part — Microcontroller. A controller processes the print job.
5. Step 5. Microcontroller — is part of — CubeSat. On-board electronics.
6. Step 6. CubeSat — has part — Solar panel. Power comes from solar panels.

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