: This refers to a comprehensive inventory of spare parts for both heavy-duty trucks (teherautó) and various types of trailers or towable units (utánfutó).
The phrase appears to be a section heading or a directional label within a larger automotive facility or a specific floor plan for a truck and trailer parts department.
If you are looking for a physical location or a "Level 0" showroom for these parts, several major suppliers operate in key industrial hubs:
: Brake discs, drums, pads, and air brake valves.
: Axles, air springs, shock absorbers, and leaf springs.