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GB/T 42697-2023 English PDF (GBT42697-2023)

GB/T 42697-2023 English PDF (GBT42697-2023)

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GB/T 42697-2023: Nonwovens -- Test method for porosity
This document describes a test method for testing the porosity of nonwoven fabrics by using the mass-density method and the true volume method. This document applies to all types of nonwovens except fluffy nonwovens.

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