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DIN EN ISO 9237:1995
Textiles - Determination of permeability of fabrics to air (ISO 9237:1995); German version EN ISO 9237:1995
The document describes a method for measuring the permeability of fabrics to air and is applicable to most types of fabrics, including industrial fabrics for technical purposes and nonwovens that are permeable to air.
Deutsches Institut für Normung [din]