Steam carriage e typewriter: o que têm em comum

1. Passo 1. Steam carriage — tem como parte — Watt steam engine. The steam engine.
2. Passo 2. Watt steam engine — faz parte de — Rotary printing press. The first rotary presses were steam-driven.
3. Passo 3. Rotary printing press — evoluiu de — Gutenberg printing press. Cylinders instead of a flat press.
4. Passo 4. Gutenberg printing press — tem como parte — Movable type. Text is set from metal type.
5. Passo 5. Movable type — funciona como — Typewriter. Each typebar carries a piece of movable type pressed against the paper.

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