Standard - International Electrotechnical Vocabulary - Part 821: Signalling and security apparatus for railways - IEC 60050-821

	International Electrotechnical Vocabulary - Part 821: Signalling and security apparatus for railways Standard · IEC standard IEC 60050-821
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IEC

Vocabulaire Electrotechnique International - Partie 821: Signalisation et appareils de sécurité pour chemin de fer

STD-124700

1998-04-29

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