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Chemicals for use in industry and science; chemicals for determining water properties; test kits for determining water properties, consisting of chemicals; chemical compositions for water treatment, in particular water treatment preparations, water softeners [preparations], ion exchange resins; unprocessed synthetic resins including ion exchange resins.Electrical pumps; microdosing pumps.Physical, chemical and electrical analysis, controlling, measuring and monitoring devices for determining water properties; test kits for determining water properties, consisting in particular of measuring tubes, plugs for closing measuring tubes, measuring pipettes; analysis cabinets for determining water properties, consisting in particular of physical, chemical and electrical analysis, controlling, measuring and monitoring devices for determining water properties; programmable, electrical controls for the control of process water circuits, water purification and desalination systems; components for water treatment systems, namely water analysis devices and parts in the form of test sets for water analysis.Water purification and desalination plants; controls [parts of water treatment systems].Customer-specific contract manufacturing of physical, chemical and electrical analysis, controlling, measuring and monitoring devices for determining water properties; customer- specific contract manufacturing of components for water treatment systems.Scientific and technological services and research and design relating thereto; industrial analysis and research services; design and development of computer hardware and software.