Paper reel and archimedes’ screw: what they have in common

1. Step 1. Paper reel — is part of — Paper machine. It winds the paper into a roll.
2. Step 2. Paper machine — has part — Belt drive. The wire moves on belts and rolls.
3. Step 3. Belt drive — is part of — Spinning wheel. The wheel is linked to the spindle by a cord.
4. Step 4. Spinning wheel — has part — Crank. A foot drive through a crank.
5. Step 5. Crank — is part of — Archimedes’ screw. A handle or rotary drive.

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