MacPherson strut and boiler: what they have in common

1. Step 1. MacPherson strut — has part — Shock absorber. A shock absorber in the strut.
2. Step 2. Shock absorber — has part — Piston. Inside, a piston moves in oil.
3. Step 3. Piston — is part of — Newcomen engine. Atmospheric pressure moves the piston.
4. Step 4. Newcomen engine — has part — Boiler. Steam from the boiler.

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