High efficiency particulate air filters (HEPA and ULPA) - Part 4: Determining leakage of filter elements (Scan method); German version EN 1822-4:2000— 29 стр.
High efficiency particulate air filters (HEPA and ULPA) - Part 4: Determining leakage of filter elements (Scan method); German version EN 1822-4:2000— 29 стр.
German construction contract procedures (VOB) - Part C: General technical specifications in construction contracts (ATV) - Installation of air conditioning systems— 33 стр.
Ventilation and air conditioning - Part 4: Ventilation in buildings and rooms of health care - Supplement 1: Checklist for planning, execution and operation of components— 16 стр.