Guitar and shipping container: what they have in common

1. Step 1. Guitar — evolved into — Electric guitar. Electrification.
2. Step 2. Electric guitar — has part — Potentiometer. The volume and tone knobs on an electric guitar are potentiometers.
3. Step 3. Potentiometer — is made of — Nickel. The resistance wire is a nickel alloy.
4. Step 4. Nickel — is material for — Turboprop. The turbine blades are nickel alloys.
5. Step 5. Turboprop — is part of — Cargo aircraft. Turboprop engines for short runways.
6. Step 6. Cargo aircraft — uses — Shipping container. Air cargo containers.

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