Home / Standards / GB/T 42697-2023 GB/T 42697-2023 Active Nonwovens—Test method for porosity 非织造布 孔隙率测试方法 Standard Type GBT ICS 59.080.30 CCS W04 Status 现行 Issue Date 2023-05-23 Implementation 2023-12-01 Responsible Dept 中国纺织工业联合会 Drafting Unit N/A