Road wheel e avião: o que têm em comum

1. Passo 1. Road wheel — faz parte de — Esteira. Road wheels roll along the track and carry the vehicle’s weight.
2. Passo 2. Esteira — funciona como — Roller chain. A track is a closed chain of hinged links driven by a sprocket; the principle is that of a roller chain, on a different scale.
3. Passo 3. Roller chain — faz parte de — Wright Flyer. The propellers were driven from the engine by bicycle chains — the Wrights were bicycle makers.
4. Passo 4. Wright Flyer — é um tipo de — Avião. The first aeroplane.

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