NF T53-034-1:1999 Plastics. Impact-resistant polystyrene (PS-I) moulding and extrusion materials. Part 1 : designation system and basis for specifications.
1999NF T53-034-1:1999 Plastics. Impact-resistant polystyrene (PS-I) moulding and extrusion materials. Part 1 : designation system and basis for specifications.
1991NF T53-034-1:1991 PLASTICS. IMPACT-RESISTANT POLYSTYRENE (SB) MOULDING AND EXTRUSION MATERIALS. PART 1 : DESIGNATION.