2021DIN EN 12255-11:2021-07 Wastewater treatment plants - Part 11: General data required; German and English version prEN 12255-11:2021 / Note: Date of issue 2021-06-04*Intended as replacement for DIN EN 12255-11 (2001-07).
2001DIN EN 12255-11:2001-07 Wastewater treatment plants - Part 11: General data required; German version EN 12255-11:2001 / Note: To be replaced by DIN EN 12255-11 (2021-07).
2001DIN EN 12255-11:2001 Wastewater treatment plants - Part 11: General data required; German version EN 12255-11:2001