An exemplary embodiment of the present disclosure illustrates a trench power MOSFET which includes a base, a plurality of first trenches, and a plurality of second trenches. The electrolyte comprises an aqueous solution comprising a compound of formula 1:CH3\u2014m\u2014OCH3Formula 1wherein m is an integer from 3 to 10. One or two head systems may use various magnetic field patterns to create the desired remanence magnetization. The closure body comprises a relief for receiving the guarantee foil and forms above the relief, by two shoulders arranged over one another and distanced from one another, a free space for receiving the lying pour-out spout. The raw signal processor processes the raw signal spectral representation in response to spectral domain spectral band replication parameters to obtain an adjusted raw signal spectral representation.