German standard methods for the examination of water, waste water and sludge - Anions (group D) - Part 33: Determination of iodide by spectrometry (D 33)
Edition 2001-02

German standard methods for the examination of water, waste water and sludge; cations (group E); determination of potassium by atomic absorption spectrometry (AAS) using an air-acetylene flame (E 13)
Edition 1992-07

German standard methods for the examination of water, waste water and sludge; gaseous components (group G); determination of chlorine dioxide (G 5)
Edition 1990-06

German standard methods for the examination of water, waste water and sludge; bio-assays (group L); determining the tolerance of green algae to the toxicity of waste water (Scenedesmus chlorophyll fluorescence test) by way of dilution series (L 33)
Edition 1991-03

Room sealed storage water heaters for the production of sanitary hot water using LPG for vehicles and boats; German version EN 15033:2006
Edition 2007-02

Aerospace series - ECO efficiency of catering equipment - Part 01: General conditions; German and English version EN 4855-01:2020
Edition 2020-04

Gas-fired central heating boilers - Part 2-2: Specific standard for type B1 appliances; German and English version prEN 15502-2-2:2022
Edition 2023-01

Specification for dedicated LPG appliances - Room sealed LPG space heating equipment for installation in vehicles and boats; German version EN 624:2011
Edition 2011-10

Broadband Integrated Services Digital Network (B-ISDN) - B-ISDN Operation and Maintenance (OAM) principles and functions; English version ETS 300404:1997
Edition 1998-07