The device pertains to a carriage which may be separate or integrated with a mobile, powered loading vehicle to load or unload railroad track materials to or from a gondola and a method thereof. Then, by applying thermal oxidation treatment to the active layer, the impurity element is subjected to redistribution, and the concentration of the impurity element in the principal surface of the active layer is minimized. The plurality of nodes may each have a depth associated therewith and the respective agent and the respective node may be selected regardless of the depth associated with the selected node. The triggering element is arranged between the base plate and the touch module. The access door includes a shielding board and an extending board. In some embodiments, registration images and other procedures may be used alone or in conjunction with the festoon placement to further reduce errors and waste.