Aqualung e plough: o que têm em comum

1. Passo 1. Aqualung — evoluiu de — Traje de mergulho. Autonomy.
2. Passo 2. Traje de mergulho — tem como parte — Piston pump. Air was pumped from the surface.
3. Passo 3. Piston pump — evoluiu para — Watt steam engine. The first steam engines (Newcomen’s) pumped water out of mines by driving pumps.
4. Passo 4. Watt steam engine — evoluiu para — Tractor. The first tractors were steam-powered.
5. Passo 5. Tractor — utiliza — Steel plough. Ploughing with a tractor.
6. Passo 6. Steel plough — evoluiu de — Plough. A steel share.

Abrir Evothings