Folded parchment quires and elevator: what they have in common

1. Step 1. Folded parchment quires — is part of — Codex (book). Folded sheets.
2. Step 2. Codex (book) — is made of — Paper. Later ones were made of paper.
3. Step 3. Paper — uses — Paper machine. Industrial production.
4. Step 4. Paper machine — has part — Belt drive. The wire moves on belts and rolls.
5. Step 5. Belt drive — has part — Pulley. The belt wraps around pulleys.
6. Step 6. Pulley — is part of — Elevator. The rope runs over a pulley.

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