Bell and hydraulic press: what they have in common

1. Step 1. Bell — is part of — Diving bell. A body open at the bottom.
2. Step 2. Diving bell — evolved into — Diving suit. Individual equipment.
3. Step 3. Diving suit — has part — Piston pump. Air was pumped from the surface.
4. Step 4. Piston pump — is part of — Concrete pump. A piston pump.
5. Step 5. Concrete pump — has part — Hydraulic cylinder. Hydraulics.
6. Step 6. Hydraulic cylinder — is part of — Hydraulic press. Two cylinders of different diameters.

Open Evothings