Ceramic parts for machines and machine tools, namely, guides for the use in machines for the controlling the movement of work pieces through machines, clamps for the use in the precision clamping of work pieces, clamps used for holding piece parts on machine tool tables, jaws for the use in the precision clamping of work pieces, wear plates and strips, blades, cutting tools, pistons for machines used in spraying liquids to work pieces during the machining process, valves being parts of machin...