Fluoride und gutenberg printing press: was sie gemeinsam haben

1. Schritt 1. Fluoride — ist Material für — Toothpaste. Fluoride.
2. Schritt 2. Toothpaste — wird verwendet in — Toothbrush. Toothpaste.
3. Schritt 3. Toothbrush — ist hergestellt aus — Plant fibre. The bristles were hog hair, later nylon.
4. Schritt 4. Plant fibre — wird verwendet in — Loom. Cloth is woven from threads spun from fibres.
5. Schritt 5. Loom — umfasst — Jacquard loom. A loom with punched cards.
6. Schritt 6. Jacquard loom — funktioniert wie — Gutenberg printing press. An analogy, not proven influence: both set type and a chain of punched cards are a replaceable pattern that a machine reproduces over and over.

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