These are custom-molded floor protectors ("preș de podea") designed with deep ridges or a "tray" shape to trap mud and debris, essential for tractors working in heavy agricultural or forest environments.
The (trapezoidal) refers to the distinct "conical" or tapered shape of the older style cabin used on these Romanian tractors. This cabin is narrower at the top and wider at the base, differentiating it from later square cab designs. Interior and "Deep Piece" Components UTB 650 Trapez
In modern refurbishments, custom "deep" trays or center consoles are often added to provide cup holders and phone storage within the vintage cabin layout. These are custom-molded floor protectors ("preș de podea")