
Letter symbols to be used in electrical technology Part 4: Rotating electric machines (IEC 25/330/FDIS:2006); German version prEN 60027-4:2006
出版:German Institute for Standardisation (Deutsches Institut für Normung)

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Letter symbols to be used in electrical technology Part 4: Rotating electric machines (IEC 25/330/FDIS:2006); German version prEN 60027-4:2006
出版:German Institute for Standardisation (Deutsches Institut für Normung)
专家解读视频