GB/T 4689. 21-1996.Leather - Determination of absorption of water. 5试样 用模刀切取试样,切时粒面向上，然后按GB4689.2进行空...
GB国家标准
GB国家标准
GB国家标准
GB/T 4689.21-2008 皮革物理和机械试验静态吸水性的测定
GB/T 4689.21-2008.Leather-Physical and mechanical tests-Determination of the static absorption of wa...