GB/T 39369-2020.Leather-Physical and mechanical tests-Determination of water vapour permeability. GB...
GB国家标准
GB国家标准
GB国家标准
GB/T 39369-2020 皮革 物理和机械试验 透水汽性测定
GB/T 39369-2020.Leather-Physical and mechanical tests-Determination of water vapour permeability. 1范...