GB/T 39452-2020.Leather- Physical and mechanical tests-Tests for adhesion of finish. GB/T 39452规定了皮革...
GB国家标准
GB国家标准
GB国家标准
GB/T 39452-2020 皮革 物理和机械试验涂层粘着牢度的测定
GB/T 39452-2020.Leather-Physical and mechanical tests-Tests for adhesion of finish. 1范围 GB/T 39452规定...