Vulcanized rubber e watt steam engine: o que têm em comum

1. Passo 1. Vulcanized rubber — é material para — Spacesuit. The pressure bladder is rubber.
2. Passo 2. Spacesuit — evoluiu de — Traje de mergulho. A sealed suit with an air supply.
3. Passo 3. Traje de mergulho — tem como parte — Piston pump. Air was pumped from the surface.
4. Passo 4. Piston pump — evoluiu para — Watt steam engine. The first steam engines (Newcomen’s) pumped water out of mines by driving pumps.

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