Rocket stage e gutenberg printing press: o que têm em comum

1. Passo 1. Rocket stage — faz parte de — Multistage rocket. Each stage is tanks and an engine, dropped once spent.
2. Passo 2. Multistage rocket — é um tipo de — Rocket. A multistage rocket is a rocket that drops its empty tanks on the way.
3. Passo 3. Rocket — é feito de — Paper. The first rockets were paper tubes filled with gunpowder.
4. Passo 4. Paper — é utilizado em — Gutenberg printing press. The impression is made on paper.

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