Stone core und gutenberg printing press: was sie gemeinsam haben

1. Schritt 1. Stone core — ist Teil von — Stone tool. A pebble from which flakes are struck.
2. Schritt 2. Stone tool — ist Teil von — Spear. Early spearheads were made of stone.
3. Schritt 3. Spear — entwickelte sich zu — Fire lance. The fire lance was a spear with a tube of gunpowder — the first step to firearms.
4. Schritt 4. Fire lance — ist hergestellt aus — Paper. The barrel of a fire lance is a paper or bamboo tube.
5. Schritt 5. Paper — wird verwendet in — Gutenberg printing press. The impression is made on paper.

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