Casa de hielo y fuelle: qué tienen en común
- Paso 1. Casa de hielo — está hecho de — Piedra. Ice houses were built of stone and sunk into the ground.
- Paso 2. Piedra — es material para — Alto horno. The shaft of a blast furnace is stone.
- Paso 3. Alto horno — tiene como parte — Fuelle. Air was blown in by bellows, later by blowers.