Pressure fuze e piston pump: o que têm em comum

1. Passo 1. Pressure fuze — faz parte de — Landmine. Triggered by pressure.
2. Passo 2. Landmine — utiliza — Gunpowder. Chinese mines of the 13th century were filled with gunpowder.
3. Passo 3. Gunpowder — é utilizado em — Canhão. A gunpowder charge.
4. Passo 4. Canhão — faz parte de — Couraçado. Artillery.
5. Passo 5. Couraçado — tem como parte — Watt steam engine. Steam engines.
6. Passo 6. 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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