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Air treatment apparatus for industrial and domestic use; namely, air conditioning units, air cooling units, electric air heating units, ventilation units, air purifying units, air filtering units, electric dust collectors, electric room deodorizing units, dried air supplying units, dehumidifiers, air drying units, humidifiers, cold/warm air-showering units, electric fans, electric ventilation fans, and electric room fragrance sprayers; heating and heat exchanging, refrigerating, freezing and chilling apparatus for industrial and domestic use; namely, heat pumps, heat exchangers, fan-coil units, water chilling units, brine chilling units, air-cooled and water cooled heat-pump chillers, cooling towers, freezers, ice machines, refrigerators, prefabricated refrigerating chambers, prefabricated freezing chambers, prefabricated cold reserving chambers, cold water suppliers, cooling installations for water, heat-pump water warmers, water boilers for use as water heaters, heating boilers for use as steam generators, hot water suppliers for uses including kitchen and bathroom use, infrared radiation stoves, far-infrared radiation stoves and electric stoves, warm air furnaces and heaters using steam circulation, infrared radiation, far-infrared radiation and electricity, electric heated carpets and mats, electric embedded floor heaters, electric hot plates for cooking; and replacement parts therefor