Printed picture and archimedes’ screw: what they have in common

1. Step 1. Printed picture — is part of — Jigsaw puzzle. A picture printed on a backing.
2. Step 2. Jigsaw puzzle — uses — Saw. Cut out with a fretsaw.
3. Step 3. Saw — is used in — Sawmill. The cutting tool is a saw.
4. Step 4. Sawmill — has part — Crank. A crank turns the wheel’s rotation into the stroke of the saw.
5. Step 5. Crank — is part of — Archimedes’ screw. A handle or rotary drive.

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