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ISO/TC 44/SC 11/WG 4
Welder qualification
DIN EN 00107086
District heating and district cooling pipes - Bonded single and twin pipe systems for directly buried hot and cold water networks - Qualification testing of PE-Welder
00107086
District heating and district cooling pipes - Bonded single and twin pipe systems for directly buried hot and cold water networks - Qualification testing of PE-Welder