Spoked wheel e typewriter: o que têm em comum

1. Passo 1. Spoked wheel — tem como parte — Spoke. Spokes connect the rim to the hub.
2. Passo 2. Spoke — faz parte de — Umbrella. Ribs hold the canopy.
3. Passo 3. Umbrella — utiliza — Lever. The folding mechanism is levers.
4. Passo 4. Lever — faz parte de — Typewriter. Each key is a system of levers.

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