Horseshoe e screw press: o que têm em comum

1. Passo 1. Horseshoe — faz parte de — Horseshoe. An iron arc shaped to the hoof.
2. Passo 2. Horseshoe — utiliza — Nail. It is nailed on.
3. Passo 3. Nail — utiliza — Wedge. The point of a nail pushes the wood apart.
4. Passo 4. Wedge — funciona como — Inclined plane. A wedge is a moving inclined plane.
5. Passo 5. Inclined plane — evoluiu para — Screw. A screw is an inclined plane wrapped around a cylinder.
6. Passo 6. Screw — é utilizado em — Screw press. The force is produced by turning a screw.

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