Plastics - Polystyrene (PS) moulding and extrusion materials - Part 1: Designation system and basis for specifications (ISO/DIS 1622-1:2010); German version prEN ISO 1622-1:2010
Plastics - Polystyrene (PS) moulding and extrusion materials - Part 1: Designation system and basis for specifications (ISO 1622-1:2012); German version EN ISO 1622-1:2012— 11 стр.