Chocolate and camera: what they have in common

1. Step 1. Chocolate — uses — Hydraulic press. Van Houten’s press separated cocoa butter.
2. Step 2. Hydraulic press — has part — Hydraulic cylinder. Two cylinders of different diameters.
3. Step 3. Hydraulic cylinder — has part — Piston. The piston is moved by liquid.
4. Step 4. Piston — is part of — Bubble chamber. It releases pressure.
5. Step 5. Bubble chamber — has part — Camera. Photographing the tracks.

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