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See Chinese contents: GB/T 4745-2012 GB/T 4745-2012: Textiles -- Testing and evaluation for water resistance -- Spray test method
This standard specifies the method for measuring the water resistance of fabrics by the spray test; gives an evaluation of the water resistance. This standard applies to fabrics with or without waterproof finishing. This standard is not applicable to the determination of the water permeability of fabrics, nor to the prediction of the rain-proof permeability of fabrics.
