Sous vide and hydraulic press: what they have in common

1. Step 1. Sous vide — uses — Vacuum sealer. Vacuum bags.
2. Step 2. Vacuum sealer — has part — Vacuum pump. A pump.
3. Step 3. Vacuum pump — evolved from — Piston pump. Guericke adapted the piston pump to pump out air.
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.

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