ISO 2531:1979/Add.1:1980
Ductile iron pipes, fittings and accessories for pressure pipelines; addendum 1

Заменен на ISO 2531(1991.10)
 

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Завершение срока действия 01.10.1991
Опубликован 01.11.1980

Ductile iron pipes, fittings and accessories for pressure pipelines; addendum 1