Central drinking water supply; Basic principles relating to the requirements on drinking water Planing, construction and operation of the installations— 29 стр.
German standard methods for the examination of water, waste water and sludge; summary indices of actions and substances (group H); determination of acid and base capacity (H7)— 10 стр.
Standard reference elastomers; Acrylonitrile-butadiene rubber (NBR), cross-linked by peroxide, for characterizing liquids with regard to their effect on NBR— 4 стр.
Standard reference elastomers; Acrylonitrile-butadiene rubber (NBR) with low acrylonitrile content for characterizing test liquids and greases based on mineral oil— 3 стр.
Standard reference elastomers; acrylonitrile-butadiene rubber (NBR), low sulphur cured, for characterizing service fluids with respect to their action on NBR— 8 стр.