Stirrup tread und rolling mill: was sie gemeinsam haben

1. Schritt 1. Stirrup tread — ist Teil von — Stirrup. A foot rest.
2. Schritt 2. Stirrup — entwickelte sich aus — Saddle. The stirrup added a foot support to the saddle.
3. Schritt 3. Saddle — ist Teil von — Fahrrad. The bicycle saddle took its name from the horse saddle.
4. Schritt 4. Fahrrad — inspirierte — Wright Flyer. The experience of the Wrights’ bicycle shop — chains, light structures, the idea of controlled instability.
5. Schritt 5. Wright Flyer — nutzt — Railway track. The Flyer had no wheels: it took off along a wooden rail.
6. Schritt 6. Railway track — nutzt — Rolling mill. Rails are rolled.

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