Direct acting indicating analogue electrical measuring instruments and their accessories; part 4: special requirements for frequency meters (IEC 60051-4:1984)
German title
Direkt wirkende anzeigende elektrische Meßgeräte und ihr Zubehör; Meßgeräte mit Skalenanzeige; Teil 4: Spezielle Anforderungen für Frequenz-Meßgeräte (IEC 60051-4:1984)
Publication date
1989-11
Original language
English
Publication date
1989-11
Original language
English
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