Pressure fuze und stone tool: was sie gemeinsam haben

1. Schritt 1. Pressure fuze — ist Teil von — Landmine. Triggered by pressure.
2. Schritt 2. Landmine — nutzt — Gunpowder. Chinese mines of the 13th century were filled with gunpowder.
3. Schritt 3. Gunpowder — wird verwendet in — Fire lance. A gunpowder charge.
4. Schritt 4. Fire lance — entwickelte sich aus — Spear. The fire lance was a spear with a tube of gunpowder — the first step to firearms.
5. Schritt 5. Spear — hat als Teil — Stone tool. Early spearheads were made of stone.

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