Propeller and joystick: what they have in common

1. Step 1. Propeller — is part of — Turboprop. A propeller.
2. Step 2. Turboprop — is made of — Nickel. The turbine blades are nickel alloys.
3. Step 3. Nickel — is material for — Potentiometer. The resistance wire is a nickel alloy.
4. Step 4. Potentiometer — is used in — Joystick. Position is read with potentiometers.

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