DIN IEC/TS 62271-304 : DRAFT 2017现行
HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR - PART 304: CLASSIFICATION OF INDOOR ENCLOSED SWITCHGEAR AND CONTROLGEAR FOR RATED VOLTAGES ABOVE 1 KV UP TO AND INCLUDING 52 KV RELATED TO THE USE IN SEVERE CLIMATIC CONDITIONS (IEC 17C/648/CD:2016)
出版：Verband Deutscher Elektrotechniker
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