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Apparatus for heating, steam generating, refrigerating, drying, ventilating and water supply purposes; Heat exchangers, in particular lamellar heat exchangers, plate heat exchangers, tubular heat exchangers; Cooling installations and machines, in particular oil coolers, air coolers, glycol recoolers, freezers; Shock frosters; Recooling apparatus for cooling media; Heating and cooling apparatus and equipment for waste heat recovery; Cooler pipes; Finned tubes; Refrigerators; Refrigerating containers; Coolers for furnaces; Refrigeration units; Refrigerating appliances and installations; Ice machines and apparatus; Freezing machines; Air conditioning installations; Air conditioning fans; Evaporators, in particular industrial high-performance evaporators; Tubular evaporators; Heat pump evaporators; Heating installations; Air heating apparatus; Ventilating installations; Level controlling valves in tanks; Regulating and safety accessories for gas apparatus, gas pipes and water apparatus; Heat regenerators; Heat accumulators; Water cooling installations; Heat pumps, ventilators (air conditioning, parts of air conditioning systems); Ventilator frames; Refrigerating machines; Refrigerant condensers; Cooling installations for liquids; Dryers for refrigeration systems; Chiller units being parts of water cooling installations; Air conditioning panels for use in walk-in coolers; Heat sinks for use in cooling apparatus; Heat sinks for use in ventilating apparatus; Heat sinks for use in heating apparatus; Gas operated devices used in cooling; Installations for the cooling of air; Refrigerating apparatus; Commercial refrigeration units; all pumps mentioned in this class to user exclusively for water cooling, water heating and waterloop systems