Sewage treatment plants - Principles for the design of structures and technical equipment - Part 3: Specific principles for the equipment for aerobical and biological sewage treatment— 13 стр.
Wastewater treatment plants - Principles for the design of structures and technical equipment - Part 3: Specific principles for the equipment for aerobical biological wastewater treatment— 28 стр.
Wastewater treatment plants - Principles for the design of structures and technical equipment - Part 3: Specific principles for the equipment for aerobical biological wastewater treatment— 28 стр.