Typewriter e saw: o que têm em comum

  1. Passo 1. Typewriter — funciona como — Movable type. Each typebar carries a piece of movable type pressed against the paper.
  2. Passo 2. Movable type — funciona como — Interchangeable parts. Movable type is an early case of interchangeable parts: identical letters move from line to line.
  3. Passo 3. Interchangeable parts — é utilizado em — Descaroçador de algodão. Whitney was one of the promoters of interchangeable parts.
  4. Passo 4. Descaroçador de algodão — tem como parte — Manivela. The drum was turned by a handle.
  5. Passo 5. Manivela — faz parte de — Sawmill. A crank turns the wheel’s rotation into the stroke of the saw.
  6. Passo 6. Sawmill — utiliza — Saw. The cutting tool is a saw.

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