DIN EN 60672-3:1999 Ceramic and glass-insulating materials - Part 3: Specifications for individual materials (IEC 60672-3:1997); German version EN 60672-3:1997
1999DIN EN 60672-3:1999 Ceramic and glass-insulating materials - Part 3: Specifications for individual materials (IEC 60672-3:1997); German version EN 60672-3:1997