NF P78-109-2-1*NF EN 1748-2-1:2005 Glass in building - Special basic products - Glass ceramics - Part 2-1 : definition and general physical and mechanical properties
2005NF P78-109-2-1*NF EN 1748-2-1:2005 Glass in building - Special basic products - Glass ceramics - Part 2-1 : definition and general physical and mechanical properties