GB/T 39507-2020.Leather-Physical and mechanical tests- Determination of abrasion resistance : Martin...
GB国家标准
GB国家标准
GB国家标准
GB/T 39507-2020 皮革 物理和机械试验耐磨性能的测定:马丁代尔球盘法
GB/T 39507-2020.Leather-Physical and mechanical tests-Determination of abrasion resistance : Martind...