NEN HD 428-2-1:1994被替代
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
出版：Nederlands Normalisatie Instituut
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