Yoke bows und watt steam engine: was sie gemeinsam haben

1. Schritt 1. Yoke bows — ist Teil von — Yoke. Bows that go around the animals’ necks.
2. Schritt 2. Yoke — wird verwendet in — Plough. It was pulled by oxen in a yoke.
3. Schritt 3. Plough — entwickelte sich zu — Steel plough. A steel share.
4. Schritt 4. Steel plough — wird verwendet in — Tractor. Ploughing with a tractor.
5. Schritt 5. Tractor — entwickelte sich aus — Watt steam engine. The first tractors were steam-powered.

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