Mouldboard e autoclave: o que têm em comum

1. Passo 1. Mouldboard — faz parte de — Steel plough. It turns the furrow over.
2. Passo 2. Steel plough — é utilizado em — Tractor. Ploughing with a tractor.
3. Passo 3. Tractor — evoluiu de — Watt steam engine. The first tractors were steam-powered.
4. Passo 4. Watt steam engine — evoluiu de — Newcomen engine. Watt improved Newcomen’s engine.
5. Passo 5. Newcomen engine — foi inspirado por — Pressure cooker. Papin’s experiments with steam and a piston preceded Newcomen’s engine.
6. Passo 6. Pressure cooker — funciona como — Autoclave. Papin’s digester was the prototype of the autoclave.

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