German standard methods for the examination of water, waste water and sludge; sludge and sediments (group S); determination of the chemical oxygen demand (COD) (S 9)
Edition 1986-09

German standard methods for the examination of water, waste water and sludge - Anions (group D) - Part 29: Spectrometric determination of nitrate with sulfosalicylic acid (D 29); ISO 7890-3:1988, modified
Edition 1994-11

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

German standard methods for the examination of water, waste water and sludge; bio-assays (group L); determining the tolerance of Daphnia to the toxicity of waste water by way of a dilution series (L 30)
Edition 1989-03

Stamped steel parts - Part 2: General tolerances
Edition 2011-10

Rolling bearings - Needle roller bearings - Part 2: Thrust needle roller and cage assemblies
Edition 2019-04

Rolling bearings - Needle roller bearings - Part 1: Needle roller and cage assemblies
Edition 2016-12

Grade 5 chain slings with hook or ring type terminal fittings
Edition 1986-07

Representing and characterizing the separation of disperse materials; Selection and determination of parameters for industrial separation processes
Edition 1982-09