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ISO/TC 331/WG 3
Protection, conservation and restoration
EN 18025
Water quality - Guidance standard on a strategic approach to river restoration
prEN 15594
Railway applications - Infrastructure - Restoration of rails by electric arc welding
DIN EN 18025
Water quality - Guidance standard on a strategic approach to river restoration; German version FprEN 18025:2025
DIN EN 15594
Railway applications - Infrastructure - Restoration of rails by electric arc welding; German and English version prEN 15594:2025
