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Electrically-operated devices|Electric heaters|Agricultural equipment|Heating equipment|Performance testing|Animal breeding|Temperature rise|Agricultural safety|Rated voltage|Marking|Testing conditions|Incubators|Protected electrical equipment|Electrical testing|Animal husbandry|Drop tests|Chickens|Poultry|Electrical household appliances|Classification systems|Livestock equipment|Safety measures|Household equipment|Electrical safety|Heaters|Instructions for use