Bandage and heat pump: what they have in common

1. Step 1. Bandage — is made of — Linen. The Egyptians bound wounds with strips of linen.
2. Step 2. Linen — is material for — Stretcher. With cloth stretched between them.
3. Step 3. Stretcher — is part of — Ambulance. A stretcher.
4. Step 4. Ambulance — has part — Ventilator. Medical equipment.
5. Step 5. Ventilator — has part — Compressor. A compressor or turbine.
6. Step 6. Compressor — is part of — Heat pump. A compressor.

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