SUV and davy lamp: what they have in common

1. Step 1. SUV — has part — Suspension. Long-travel suspension.
2. Step 2. Suspension — has part — Shock absorber. Shock absorbers are part of the suspension.
3. Step 3. Shock absorber — has part — Piston. Inside, a piston moves in oil.
4. Step 4. Piston — is part of — Newcomen engine. Atmospheric pressure moves the piston.
5. Step 5. Newcomen engine — uses — Coal mine. Pumping water out of mines.
6. Step 6. Coal mine — uses — Davy lamp. Protection against methane explosions.

Open Evothings