Chaminé e vacuum pump: o que têm em comum

1. Passo 1. Chaminé — faz parte de — Steam locomotive. Smoke from the firebox leaves through the locomotive's chimney.
2. Passo 2. Steam locomotive — tem como parte — Watt steam engine. A steam locomotive is driven by a steam engine.
3. Passo 3. Watt steam engine — evoluiu de — Piston pump. The first steam engines (Newcomen’s) pumped water out of mines by driving pumps.
4. Passo 4. Piston pump — evoluiu para — Vacuum pump. Guericke adapted the piston pump to pump out air.

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