Rectifier e r-7 rocket: o que têm em comum

1. Passo 1. Rectifier — faz parte de — LED lamp. The driver in the base rectifies mains current and limits the LED current; in an ordinary bulb it has no transformer.
2. Passo 2. LED lamp — evoluiu de — Incandescent light bulb. It replaced incandescent bulbs.
3. Passo 3. Incandescent light bulb — evoluiu de — Oil lamp. The electric lamp replaced oil and gas lamps.
4. Passo 4. Oil lamp — evoluiu para — Kerosene lamp. A development of the oil lamp.
5. Passo 5. Kerosene lamp — utiliza — Kerosene. The fuel.
6. Passo 6. Kerosene — é material para — R-7 rocket. The fuel is kerosene.

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