Conversor Bessemer e typewriter: o que têm em comum

1. Passo 1. Conversor Bessemer — evoluiu para — Open-hearth furnace. A more controllable process.
2. Passo 2. Open-hearth furnace — é feito de — Tijolo. An open-hearth furnace is built of firebrick.
3. Passo 3. Tijolo — é feito de — Argila. Bricks are moulded from clay.
4. Passo 4. Argila — é material para — Movable type. Bi Sheng’s type was made of fired clay.
5. Passo 5. Movable type — funciona como — Typewriter. Each typebar carries a piece of movable type pressed against the paper.

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