A package containing a stack of wet wipes moistened with aqueous lotion is disclosed. The stimulus can be delivered to a nerve via a set of multiple electrode contacts according to a stimulation parameter that maximizes a joint moment associated with the stimulus and minimizes the overlap between pairs of contacts. For this purpose, subwavelength structures are etched on one of the ends of an emissive cavity, enabling the external face to be controlled. The binding layer can be an oxide and the second layer a conductive material that is diffusible into an oxide. The feeding system obtains the at least one sheet from the lifting system and feeds the at least one sheet toward an installation apparatus for installation on the mine roof. With this skiving head, both the requirement for self-centering of the skiving blade set as well as the requirement for circular skiving geometry with consistent cutting depth are fulfilled.