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Abstract
Contents : General; Applications; Economic aspects - Statistics - Cost figures; Electric distribution; Electric service; Grain and forage grinding - Moisture content; Heating; Horticulture; Hotbeds - Soil heating - Sterilization - Fertility; Household applications; Lighting and wiring; Line studies; Machinery; Motors; Pest control; Plants - Windmills; Ploughing; Poultry equipment; Power; Refrigeration; Silo filling; Ventilation; Water heating; Water supply