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Common metals and their alloys; steel containers for the chemical and pharmaceutical industries, in particular enamelled steel containers for the chemical and pharmaceutical industries, as well as their parts, like flanges, pipes, tubes, nozzles, covers and valves; metal building materials; in particular each enameled. Machines for the chemical and pharmaceutical industries as well as parts thereof, like agitators, baffles and control devices; compressors or condensing installations; motors (except motors for vehicles); mixing machines and parts thereof. Electric and electronic control devices for apparatus of the chemical or pharmaceutical industry, as well as parts of all the aforementioned devices. Apparatus for heating, steam generating, cooling, distilling and drying and heat exchangers, not parts of machines; as well as parts of the aforementioned devices. Installation and maintenance services, namely, installation and repair of machines, tools and/or containers as well as parts thereof, namely, installation and repair of enamelled or otherwise coated machines, tools and/or containers, as well as parts thereof.