F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
F25D21/002—Defroster control
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Combustion & Propulsion
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Devices That Are Associated With Refrigeration Equipment
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