Hair spray and CNC machine: what they have in common

1. Step 1. Hair spray — uses — Aerosol can. Hair spray comes out of an aerosol can as fine droplets, so it settles as an even film.
2. Step 2. Aerosol can — uses — Pressure. A propellant gas.
3. Step 3. Pressure — is used in — Waterjet cutting. A pressurized jet.
4. Step 4. Waterjet cutting — uses — CNC machine. CNC.

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