Supermarket and hydraulic press: what they have in common

1. Step 1. Supermarket — uses — Barcode. Barcodes.
2. Step 2. Barcode — is used in — Warehouse robot. Navigation by markers.
3. Step 3. Warehouse robot — evolved from — Forklift. Automating warehouses.
4. Step 4. Forklift — has part — Hydraulic cylinder. Lifting the forks.
5. Step 5. Hydraulic cylinder — is part of — Hydraulic press. Two cylinders of different diameters.

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