DIN EN 10253-4-2003Butt-welding pipe fittings - Part 4: Wrought austenictic and austenitic-ferritic (duplex) stainless steels with specific inspection requirements
DIN EN 10253-4-2003|Butt-welding pipe fittings - Part 4: Wrought austenictic and austenitic-ferritic (duplex) stainless steels with specific inspection requirements
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