DIN EN 60079-15:2011 Explosive atmospheres - Part 15: Equipment protection by type of protection "n" (IEC 60079-15:2010); German version EN 60079-15:2010
2011DIN EN 60079-15:2011 Explosive atmospheres - Part 15: Equipment protection by type of protection "n" (IEC 60079-15:2010); German version EN 60079-15:2010