GB/T 39364-2020.Leather- Chemical , physical , mechanical and fastness tests- Sampling location. 4.1...
GB/T 39364-2020 皮革 化学、物理、机械和色牢度试验取样部位
GB/T 39364-2020.Leather-Chemical , physical , mechanical and fastness tests-Sampling location。 1范围 G...