DIN EN ISO 28721-5:2016 Vitreous and porcelain enamels - Glass-lined apparatus for process plants - Part 5: Presentation and characterisation of defects (ISO 28721-5:2016); German version EN ISO 28721-5:2016 has been changed from DIN 51176-1:2003 Vitreous and porcelain enamels - Presentation and characterisation of defects - Part 1: Enamels for chemical service and vessels.
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