Firebox e solar panel: o que têm em comum

1. Passo 1. Firebox — faz parte de — Hypocaust. A furnace outside the building.
2. Passo 2. Hypocaust — é feito de — Tijolo. The pillars of a hypocaust are brick.
3. Passo 3. Tijolo — é material para — Power station. The buildings of the first power stations were brick.
4. Passo 4. Power station — inclui — Solar power station. A power station.
5. Passo 5. Solar power station — tem como parte — Solar panel. A field of panels.

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