Nebulizer cup e hammer: o que têm em comum

1. Passo 1. Nebulizer cup — faz parte de — Nebulizer. It turns the medicine into an aerosol.
2. Passo 2. Nebulizer — tem como parte — Compressor. A compressor.
3. Passo 3. Compressor — faz parte de — Refrigerator. A compressor with an electric motor.
4. Passo 4. Refrigerator — evoluiu de — Ice house. The refrigerator replaced natural ice.
5. Passo 5. Ice house — é feito de — Stone. Ice houses were built of stone and sunk into the ground.
6. Passo 6. Stone — é material para — Hammer. The first hammer was a hammerstone, later mounted on a handle.

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