Wooden bucket e tank: o que têm em comum

1. Passo 1. Wooden bucket — faz parte de — Well. It scoops up water.
2. Passo 2. Well — utiliza — Windlass. The bucket was raised with a windlass.
3. Passo 3. Windlass — utiliza — Wheel. A windlass is a wheel and axle used as a simple machine.
4. Passo 4. Wheel — faz parte de — Siege tower. On wheels.
5. Passo 5. Siege tower — funciona como — Tank. An armoured mobile shelter and platform for attacking fortifications.

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