Chain mail and paper machine: what they have in common

1. Step 1. Chain mail — works like — Roller chain. Interlinked links — a flexible metal structure.
2. Step 2. Roller chain — is part of — Escalator. A chain pulls the steps.
3. Step 3. Escalator — works like — Conveyor belt. An escalator is a conveyor with steps.
4. Step 4. Conveyor belt — works like — Paper machine. Fourdrinier’s endless wire mesh moves like a conveyor belt, forming the web of paper.

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