DIN 19557:1965-07

Отменен

Media for trickling filters for biological treatment of sewage; requirements, testing, insertion — 3 стр.

Заменен на

DIN 19557-1:1984-05

ICS

13.060.30 Sewage. Including sewage water disposal and treatment / Сточные воды. Включая удаление и очистку сточных вод