Schweißzertifikat nach DNV GL für Rumpfstrukturen
nach "DNV GL rules for classification - ships", "DNV GL class programme DNVGL-CP-0352 - Approval of manufacturers - Manufacture of welded products - welding workshop"
nach "DNV GL rules for classification - ships", "DNV GL class programme DNVGL-CP-0352 - Approval of manufacturers - Manufacture of welded products - welding workshop"