TECHNISCHE REGEL
ONR CEN ISO/TR 20172
Issue date: 2021 06 15
Welding - Grouping systems for materials - European materials (ISO/TR 20172:2021)
General information on ONR CEN ISO/TR 20172
Timeline
An overview of the development of ONR CEN ISO/TR 20172 from 2013 til today.
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ONR CEN ISO/TR 20172Welding - Grouping systems for materials - European materials (ISO/TR 20172:2021)
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ONR CEN ISO/TR 20172Welding - Grouping systems for materials - European materials (ISO/TR 20172:2009)
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