Turbojet engine and aerosol can: what they have in common

1. Step 1. Turbojet engine — has part — Compressor. The compressor compresses the air.
2. Step 2. Compressor — is part of — Ventilator. A compressor or turbine.
3. Step 3. Ventilator — has part — Valve. Valves.
4. Step 4. Valve — is part of — Aerosol can. A valve.

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