Micrometer und rocket: was sie gemeinsam haben

1. Schritt 1. Micrometer — wird verwendet in — Interchangeable parts. Precise measurement ensures interchangeability.
2. Schritt 2. Interchangeable parts — wird verwendet in — Revolver. Colt used machine production of interchangeable parts.
3. Schritt 3. Revolver — nutzt — Gunpowder. Gunpowder propels the bullet.
4. Schritt 4. Gunpowder — wird verwendet in — Rocket. The first rockets were powered by gunpowder.

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