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MOLDED PARTS OF RUBBER AND PLASTIC FOR INDUSTRIAL USE, NAMELY, SEALS, GASKETS, BUSHINGS, VALVES AND PARTS OF VALVES MADE OF RUBBER, WASHERS, BRAKE LINERS, SUCTION AND BRAKE CUPS, DIAPHRAGMS, BALLS, RINGS OF RUBBER, RUBBER INSULATORS, RUBBER FITTINGS, HOSES, SLEEVES, STOPPERS, GROMMETS, RUBBER REINFORCING MATERIAL FOR MACHINE BELTS, AND BUFFERS