Pumped-storage station und railway track: was sie gemeinsam haben

1. Schritt 1. Pumped-storage station — hat als Teil — Water turbine. Reversible hydro units.
2. Schritt 2. Water turbine — entwickelte sich aus — Water wheel. The turbine is a development of the water wheel.
3. Schritt 3. Water wheel — wird verwendet in — Rolling mill. The first mills were turned by water.
4. Schritt 4. Rolling mill — wird verwendet in — Railway track. Rails are rolled.

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