Hypocaust e micrometer: o que têm em comum

1. Passo 1. Hypocaust — é feito de — Tijolo. The pillars of a hypocaust are brick.
2. Passo 2. Tijolo — é feito de — Argila. Bricks are moulded from clay.
3. Passo 3. Argila — é material para — Movable type. Bi Sheng’s type was made of fired clay.
4. Passo 4. Movable type — funciona como — Interchangeable parts. Movable type is an early case of interchangeable parts: identical letters move from line to line.
5. Passo 5. Interchangeable parts — utiliza — Micrometer. Precise measurement ensures interchangeability.

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