Capacitor and pneumatic tube: what they have in common

1. Step 1. Capacitor — is part of — Defibrillator. The energy of the shock is stored in a capacitor.
2. Step 2. Defibrillator — is part of — Ambulance. A defibrillator.
3. Step 3. Ambulance — has part — Ventilator. Medical equipment.
4. Step 4. Ventilator — has part — Compressor. A compressor or turbine.
5. Step 5. Compressor — is part of — Pneumatic tube. A pressure or vacuum blower.

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