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BS IEC 60335-2-51. Household and similar electrical appliances. Safety. Part 2-51. Particular requirements for stationary circulation pumps for heating and service water installations|Cold-water supply systems, Water pumps, Protected electrical equipment, Safety measures, Heating equipment, Hot-water central heating, Motor pumps, Electrical safety, Pumps, Central heating, Hot-water supply systems, Performance testing, Rated power, Domestic safety, Electrical household appliances, Household equipment, Stationary, Rated voltage, Electrically-operated devices

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