Air fryer and piston pump: what they have in common

1. Step 1. Air fryer — has part — Electric fan. A fan.
2. Step 2. Electric fan — is part of — Mine ventilation. Fans.
3. Step 3. Mine ventilation — is used in — Coal mine. Airing the workings.
4. Step 4. Coal mine — is used in — Newcomen engine. Pumping water out of mines.
5. Step 5. Newcomen engine — has part — Piston pump. The beam drove a mine pump.

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