The Collaborative International Dictionary
Wrecking \Wreck"ing\, a. & n. from Wreck, v.
Wrecking car (Railway), a car fitted up with apparatus and implements for removing the wreck occasioned by an accident, as by a collision.
Wrecking pump, a pump especially adapted for pumping water from the hull of a wrecked vessel.
Wiktionary
n. A railway car fitted with apparatus and implements for removing the wreck resulting from an accident.
Usage examples of "wrecking car".
Yes, there was a powerful wrecking car swinging around ^he corner toward them.
A wrecking car, equipped with derrick and windlass, was parked at the edge of the wharf.
Cars were parked on the gravel off the pavement--several private cars, an official car, and a wrecking car.
It looks as though it will take a wrecking car to get my car out of this ditch.