Telephone e heat pump: o que têm em comum

1. Passo 1. Telephone — evoluiu para — Mobile phone. A mobile phone keeps the function of a telephone, replacing the wire with a radio channel.
2. Passo 2. Mobile phone — tem como parte — Integrated circuit. Inside a phone are microchips: processor, memory, radio.
3. Passo 3. Integrated circuit — utiliza — Sala limpa. Production in cleanrooms.
4. Passo 4. Sala limpa — utiliza — Ar-condicionado. Air filtration.
5. Passo 5. Ar-condicionado — utiliza — Heat pump. An air conditioner is a heat pump that carries heat out of the room.

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