Solder and paper machine: what they have in common

1. Step 1. Solder — is made of — Tin. Tin solder.
2. Step 2. Tin — is material for — Ice cream maker. Inside is a tin cylinder.
3. Step 3. Ice cream maker — has part — Crank. A handle.
4. Step 4. Crank — is part of — Spinning wheel. A foot drive through a crank.
5. Step 5. Spinning wheel — has part — Belt drive. The wheel is linked to the spindle by a cord.
6. Step 6. Belt drive — is part of — Paper machine. The wire moves on belts and rolls.

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