Library catalogue e piston pump: o que têm em comum

1. Passo 1. Library catalogue — tem como parte — Index card. Cards.
2. Passo 2. Index card — é feito de — Paper. Paper.
3. Passo 3. Paper — é utilizado em — Rotary printing press. It prints on a paper web.
4. Passo 4. Rotary printing press — tem como parte — Watt steam engine. The first rotary presses were steam-driven.
5. Passo 5. Watt steam engine — evoluiu de — Piston pump. The first steam engines (Newcomen’s) pumped water out of mines by driving pumps.

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