7 MACHINE PARTS, NAMELY, NON-METAL MECHANICAL SEALS; CERAMIC LININGS FOR GRINDING MILLS AND CYCLONES; POWER OPERATED GRINDING WHEELS; CERAMIC LININGS FOR CYCLONES AND OTHER MATERIAL HANDLING MACHINERY, NAMELY LININGS RESISTANT TO ABRASION, CORROSION OR TEMPERATURE; MACHINE PARTS, NAMELY CERAMIC VALVES, PISTONS AND CYLINDERS FOR SOFT DRINK BEVERAGE DISPENSERS; MACHINE PARTS, NAMELY, CERAMIC NOZZLES, PUMPS, VALVES AND BEARINGS FOR FLUID PROCESSING MACHINES; PULP, PAPER MAKING AND PROCESSING MACHINES AND PARTS THEREFOR; CERAMIC MECHANICAL SEALS AND SEAL FACES FOR WATER PUMPS; AIR CONDITIONER COMPRESSORS AND CENTRIFUGAL PUMPS; CERAMIC PARTS FOR AGRICULTURAL, CHEMICAL, OIL, SUBMERSIBLE AND CENTRIFUGAL PUMPS, NAMELY SLEEVES, PISTONS, BUSHINGS, VALVE BALLS AND SEATS, SHAFTS, IMPELLERS; CERAMIC PARTS FOR HOISTS, NAMELY, WEAR-RESISTANT PULLEYS, CAPSTANS, DRAWCONES, REPLACEMENT RINGS, AND GUIDE AND PINCH ROLLS FOR WIRES AND CABLES; MACHINE PARTS, NAMELY NON-METALLIC PISTON RINGS, MECHANICAL SEALS, BEARINGS, BUSHINGS, RODS, PISTONS AND CYLINDERS FOR INDUSTRIAL MACHINES; CERAMIC WEAR TILES FOR IMPELLERS, FAN BLADES AND HOUSINGS, VALVE GATES AND IMPACT PANELS; CERAMIC MACHINE PARTS, NAMELY BEARINGS AND BUSHINGS; CERAMIC AND PLASTIC PARTS FOR SEMICONDUCTOR PROCESSING MACHINES, NAMELY, CMP WAFER HOLDERS, PLASMA ETCH RINGS, AND SEMICONDUCTOR CHIP TRAYS