Wastewater treatment plants - Part 9: Odour control and ventilation; German version EN 12255-9:2002
Edition 2002-04

Wastewater treatment plants - Part 15: Measurement of the oxygen transfer in clean water in aeration tanks of activated sludge plants; German version EN 12255-15:2003
Edition 2004-04

Woodruff cutters; technical delivery conditions
Edition 1990-04

Fluid power systems and components - Cylinder-rod wiper-ring housings in reciprocating applications - Dimensions and tolerances (ISO 6195:2013)
Edition 2018-10

Plain bearings - Terms, definitions, classification and symbols - Part 2: Friction and wear (ISO 4378-2:2009)
Edition 2013-12

Hydraulic fluid power-cylinder; piston seal housings incorporating bearing rings; dimensions and tolerances; Corrigendum 1
Edition 2019-04

Wastewater treatment plants - Part 6: Activated sludge process; German and English version prEN 12255-6:2021
Edition 2021-07

Ventilation for buildings - Performance testing of components/products for residential ventilation - Part 3: Range hoods for residential use without fan; German version EN 13141-3:2017
Edition 2017-09

Textile floor coverings - Vocabulary (ISO 2424:2007)
Edition 2021-06

Ventilation for buildings - Performance testing of components/products for residential ventilation - Part 10: Humidity controlled extract air terminal device; German version EN 13141-10:2008
Edition 2008-10