Well head und heat pump: was sie gemeinsam haben

1. Schritt 1. Well head — ist Teil von — Well. The part above ground that keeps out contamination.
2. Schritt 2. Well — ist hergestellt aus — Stone. The walls of wells were lined with stone.
3. Schritt 3. Stone — ist Material für — Ice house. Ice houses were built of stone and sunk into the ground.
4. Schritt 4. Ice house — entwickelte sich zu — Refrigerator. The refrigerator replaced natural ice.
5. Schritt 5. Refrigerator — funktioniert wie — Heat pump. A heat pump is a refrigerator that heats the house.

Evothings öffnen