Launch complex and typewriter: what they have in common

1. Step 1. Launch complex — uses — Rocket. Launching rockets.
2. Step 2. Rocket — is made of — Paper. The first rockets were paper tubes filled with gunpowder.
3. Step 3. Paper — is used in — Gutenberg printing press. The impression is made on paper.
4. Step 4. Gutenberg printing press — has part — Movable type. Text is set from metal type.
5. Step 5. Movable type — works like — Typewriter. Each typebar carries a piece of movable type pressed against the paper.

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