ELECTRICAL RESISTORS AND COMBINATIONS OF SUCH RESISTORS, POTENTIOMETERS, PARTS FOR MOUNTING RESISTORS, THICK-LAYER CIRCUITS, THIN-LAYER CIRCUITS, MODULI IN THICK-LAYER AND THIN-LAYER TECHNIQUE, ELECTRIC CAPACITORS, CERAMIC FEED-THROUGH FILTERS, CERAMIC PARTS FOR CAPACITORS, PIEZO-CERAMIC SPOT FREQUENCY FILTERS, PIEZO-ELECTRIC CERAMIC PARTS