MacPherson strut e gutenberg printing press: o que têm em comum

1. Passo 1. MacPherson strut — tem como parte — Shock absorber. A shock absorber in the strut.
2. Passo 2. Shock absorber — tem como parte — Piston. Inside, a piston moves in oil.
3. Passo 3. Piston — faz parte de — Watt steam engine. Steam pushes the piston in the cylinder.
4. Passo 4. Watt steam engine — faz parte de — Rotary printing press. The first rotary presses were steam-driven.
5. Passo 5. Rotary printing press — evoluiu de — Gutenberg printing press. Cylinders instead of a flat press.

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