Flute embouchure hole and screw press: what they have in common

1. Step 1. Flute embouchure hole — is part of — Flute. A stream of air is split against an edge.
2. Step 2. Flute — uses — Sound wave. Sound.
3. Step 3. Sound wave — is used in — Loudspeaker. It creates sound waves.
4. Step 4. Loudspeaker — is made of — Paper. The cone is paper.
5. Step 5. Paper — is used in — Gutenberg printing press. The impression is made on paper.
6. Step 6. Gutenberg printing press — has part — Screw press. Gutenberg adapted the screw press known from pressing grapes.

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