Vehicle and pneumatic tube: what they have in common

1. Step 1. Vehicle — includes — Aircraft. Aircraft are a kind of transport.
2. Step 2. Aircraft — includes — Helicopter. An aircraft.
3. Step 3. Helicopter — has part — Gas turbine. A turboshaft engine.
4. Step 4. Gas turbine — has part — Compressor. A compressor.
5. Step 5. Compressor — is part of — Pneumatic tube. A pressure or vacuum blower.

Open Evothings