Space helmet with visor and CNC machine: what they have in common

1. Step 1. Space helmet with visor — is part of — Spacesuit. A transparent helmet with a light filter.
2. Step 2. Spacesuit — uses — Pressure. Maintaining pressure.
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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