NF T53-031-1:2006 Plastics - Poly(methyl methacrylate) (PMMA) moulding and extrusion materials - Part 1 : designation system and basis for specifications.
2006NF T53-031-1:2006 Plastics - Poly(methyl methacrylate) (PMMA) moulding and extrusion materials - Part 1 : designation system and basis for specifications.
1990NF T53-031:1990 Plastics. Poly(methyl methacrylate) (pmma) moulding and extrusion materials. Part 1 : designation.