A “permanent crane” is:

1. A new fixture that is designed to elevate the axle while changing a punctured tire.
2. A fixture in the vehicle that prevent the vehicle from rolling-over during loading or unloading of an interchangeable box.
3. Correct answer: A fixture that is permanently installed in the vehicle and designed to lift or lower interchangeable crates..
4. A fixture that is permanently connected to the vehicle and designed to lift one side of a side-loading-platform.

WhyA permanent crane is a fixture permanently installed on the vehicle to lift and lower interchangeable crates. It is not a jack.