Sergei Tumanov (asker) Dec 20, 2005:

� ��� ����� feather edge? � ��� ��� ����� ��-������?

Sergei Tumanov (asker) Dec 19, 2005:

�������! ������ ����� ����.
����� � ������ ����, �� ���� �� ���������, ������ �� �����, � ������ �������� ����������� �� ���� ������ ������ (����� �����)

Gas filter for carbon monoxide (e. g. EN 14387 Type CO)
Gas filter for mercury and particles (e.g. EN 14387 Type Hg-P3)
Gas filter for nitrogen oxides such as NO, NO2, NOx and particles (e.g. EN 14387 Type NO-P3)
Gas filter for gases/vapours of organic compounds (boiling point <65 �C, f.e. EN 14387 Type AX)
Gas filter for gases/vapours of inorganic compounds (f.e. EN 14387 Type B)
Gas filter for acid inorganic gases/vapours such as SO2, HCl (e.g. EN 14387 Type E).
Gas filter for gases/vapours of alkaline compounds such as ammonia, amines (e.g. EN 14387 Type K).
Particle filter with low efficiency for solid particles (e.g. EN 143 or 149, Type P1or FFP1)
Particle filter with high efficiency for solid and liquid particles (f.e. EN 143 or 149, Type P3 or FFPE)
Combination filter for gases/vapours of organic, inorganic, acid inorganic and alkaline compounds (e.g. EN 14387 Type ABEK).

Kirill Semenov Dec 19, 2005:

������������� ������ is thought-provoking, ��� ������, �� EN 166 - ��� ����������� �������� �� ������� ���� ����. ��� ��� ��-���� "��������" ��������.