17 LOOSE CERAMIC PARTS FOR INDUSTRIAL/MANUFACTURING USE IN THE MICROENGINEERING, ELECTRICAL AND ELECTRONIC INDUSTRY AND FOR MAKING JEWELRY, SUCH AS NOZZLES, DRAWPLATES, CAPILLARIES, TUBES, PLATES, SUPPORTS, INSULATING DUCTS, ELECTRONIC COMPONENTS AND MICROCIRCUITS, HEAT-INSULATING MATERIALS AND PARTS RESISTANT TO CORROSION AND MECHANICAL WEAR, WITH A LOW LEVEL OF THERMAL EXPANSION; AND ASSEMBLIES OF THESE PARTS FOR FURTHER MANUFACTURE IN SCIENTIFIC, ELECTRICAL, OPTICAL, ELECTRONIC, HYDRAULIC AND CHEMICAL APPARATUS AND INSTRUMENTS