DIN EN 10253-1:1999-11 Butt-welding pipe fittings - Part 1: Wrought carbon steel for general use and without specific inspection requirements; German version EN 10253-1:1999
1999DIN EN 10253-1:1999-11 Butt-welding pipe fittings - Part 1: Wrought carbon steel for general use and without specific inspection requirements; German version EN 10253-1:1999
1999DIN EN 10253-1:1999 Butt-welding pipe fittings - Part 1: Wrought carbon steel for general use and without specific inspection requirements; German version EN 10253-1:1999