Electrical apparatus for use in the presence of combustible dust - Part 1: Protection by enclosures "tD" (IEC 61241-1:2004); German version EN 61241-1:2004
German title
Elektrische Betriebsmittel zur Verwendung in Bereichen mit brennbarem Staub - Teil 1: Schutz durch Gehäuse "tD" (IEC 61241-1:2004); Deutsche Fassung EN 61241-1:2004
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