GB/T 39370-2020.Leather- Physical and mechanical tests-Determination of surface reflectance. GB/T 39...
GB国家标准
GB国家标准
GB国家标准
GB/T 39370-2020 皮革物理和机械试验表面反射性能的测定
GB/T 39370-2020.Leather-Physical and mechanical tests-Determination of surface reflectance. 1范围 GB/T...