NF A50-630-8*NF EN 755-8:2016 Aluminium and aluminium alloys - Extruded rod/bar, tube and profiles - Part 8 : porthole tubes, tolerances on dimensions and form
2016NF A50-630-8*NF EN 755-8:2016 Aluminium and aluminium alloys - Extruded rod/bar, tube and profiles - Part 8 : porthole tubes, tolerances on dimensions and form