Applies to hard water to be used for testing the performance of some household electrical appliances such as washing machines, steam irons, etc. Defines the characteristics of this hard water and establishes the method to be used for obtaining it.
97.030 Domestic. Including water-bed heaters and electric blankets / Бытовые электрические приборы в целом. Включая нагреватели водяных кроватей и электроодеяла
