German standard methods for the examination of water, waste water and sludge; summary indices of actions and substances (group H); water hardness (H 6)— 4 стр.
German standard methods for the examination of water, waste water and sludge - General measures of effects and substances (group H) - Part 7: Determination of acid and base capacity (H 7)— 27 стр.
Chemicals used for treatment of water intended for human consumption - Sodium chloride for regeneration of ion exchangers; German version EN 973:2002— 56 стр.
Softeners (cation exchangers) for drinking water installation - Part 100: Requirements for application of softeners in accordance with DIN EN 14743— 13 стр.
Equipment for commercial kitchens - Systems for treatment of potable water for commercial kitchens - Part 1: Decarbonisation-systems installed before equipment for commercial kitchens— 18 стр.
