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— 19 стр.
Ergonomic design of control centres - Part 1: Principles for the design of control centres (ISO 11064-1:2000); German version EN ISO 11064-1:2000— 29 стр.
Ergonomic design of control centres - Part 2: Principles for the arrangement of control suites (ISO 11064-2:2000); German version EN ISO 11064-2:2000— 16 стр.
Wastewater treatment plants - Principles for the design of structures and technical equipment - Part 13: Equipment for separation and treatment of mineral solids such as grit— 21 стр.