7 Ceramic parts for machines, machine tools and motors, namely, guides for use in machines for controlling the movement of work pieces through machines, clamps for use in the precision clamping of work pieces, clamps used for holding piece parts on machine tool tables, jaws for use in the precision clamping of work pieces, wear plates and strips, blades, cutting tools, pistons for dosing machines used in filling containers with liquids during the manufacturing process, valves being parts of machines; ceramic parts for machines, machine tools and motors, namely, ceramic centering pins and positioning pins; machine parts of ceramic, in particular air nozzles and friction discs; clinching, pulling and pressing machine tools for metal forming; drilling bits being machine parts; drilling heads being machine parts; machine parts, namely, mechanical blades, mechanical pistons, mechanical bearings; pumps as parts of machines; electric beaters being machine parts; agitators for circulating liquid media; valves being parts of machines; shafts being parts of machines; guides being parts of machines; structural parts for the aforesaid goods, included in this class; anti-friction pads being parts of machines; moulds being parts of machines; grease rings being parts of machines; gaskets being parts of engines; bearing housings being parts of machines, motors and engines; bearings being parts of machines; guide rails being parts of machines for installation construction and mechanical engineering; wear strips being parts of machines for installation and machine manufacture