DIN 42500-21:1995-04
Отменен
Three phase oil-immersed distribution transformers 50 Hz, from 50 to 2500 kVA with highest voltage for equipment not exceeding 36 kV - Part 2: Distribution transformers with cable boxes on the high voltage and/or low voltage side; section 1: General requirements; German version HD 428.2.1 S1:1994
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