Blog e sonar: o que têm em comum

1. Passo 1. Blog — evoluiu de — Newspaper. A personal publication.
2. Passo 2. Newspaper — utiliza — Rotary printing press. Mass print runs.
3. Passo 3. Rotary printing press — tem como parte — Watt steam engine. The first rotary presses were steam-driven.
4. Passo 4. Watt steam engine — evoluiu para — Steam turbine. The turbine replaced piston engines in large installations.
5. Passo 5. Steam turbine — faz parte de — Contratorpedeiro. Turbines.
6. Passo 6. Contratorpedeiro — tem como parte — Sonar. Underwater acoustics.

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