Elektrolokomotive und watt steam engine: was sie gemeinsam haben

1. Schritt 1. Elektrolokomotive — hat als Teil — Railway coupling. An electric locomotive pulls its wagons through a coupling.
2. Schritt 2. Railway coupling — ist Teil von — Steam locomotive. A locomotive hooks up its wagons with a coupling.
3. Schritt 3. Steam locomotive — hat als Teil — Watt steam engine. A steam locomotive is driven by a steam engine.

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