00732nam 2200241zu 450 991100685180332120250328005705.097815231638231523163828(CKB)38098563200041(EXLCZ)993809856320004120250328|2025uuuu || |engur|||||||||||Specification for the Qualification of Welding Engineering PersonnelAmerican Welding Society (AWS)20259781643223261 1643223267 American Welding Society1821781BOOK9911006851803321Specification for the Qualification of Welding Engineering Personnel4387652UNINA