Functional safety of electrical/electronic/programmable electronic safety-related systems - Part 4: Definitions and abbreviations (IEC 61508-4:1998 + Corrigendum 1999); German version EN 61508-4:2001
German title
Funktionale Sicherheit elektrischer/elektronischer/programmierbar elektronischer sicherheitsbezogener Systeme - Teil 4: Begriffe und Abkürzungen (IEC 61508-4:1998 + Corrigendum 1999); Deutsche Fassung EN 61508-4:2001
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