GB/T 39375-2020.Leather-Physical and mechanical tests-Determination of dimensional change.GB/T 39375规定了皮革尺寸变化的测定方法。GB/T 39375适用于各种类型的皮革...
GB/T 39507-2020.Leather-Physical and mechanical tests- Determination of abrasion resistance : Martindale ball plate method.GB/T 39507规定了马丁代尔球盘法测定皮革耐磨性...
GB/T 39368-2020.Leather-Physical and mechanical tests-Determination of flex resistance : Vamp flex method.6试验步骤6.1移开夹具(4.1.1)的 上部,调整每对夹具至最大分离...
GB/T 39369-2020.Leather-Physical and mechanical tests-Determination of water vapour permeability.GB/T 39369规定了皮革透水汽性的测定方法.GB/T 39369适用于各种类型皮...
GB/T 39372-2020.Leather-Physical and mechanical tests-Determination of percentage extension.5.2试样 的制备用模刀(4.3)从粒面切取6个试样,其中3个试样的长边平行于...
GB/T 39376-2020.Leather- Sampling -Number of items for a gross sample.1范围GB/T 39376规定了从生产批中抽取整张样品数量的方法.GB/T 39376适用于各种类型皮革产...
GB/T 39388- 2020/CIE S 023/E:2013.Characterization of the performance of illuminance meters and luminance meters.GB/T 39388适用于照度计和亮度计.本标准定义了应用于普...
GB/T 39378-2020.Sockets for spark-plugs- and glow-plugs.GB/T 39378规定了火花塞和电热塞套简的分类.要求.试验方法、检验规则和标志包装、运输与贮存。...
GB/T 40002-2021.Oral hard tissue safety evaluation of toothpastes.5.2.2磨抛设备具有连续粒度变化的碳化硅研磨盘(最细可达P1200),能使用金刚石浆料进行样本...
GB/T 39999-2021.Determination of 15 kinds of prohibited quinolone-type antibiotics in cosmetics including enrofloxacin- -Liquid chromatography-tandem mass spectrometry.GB/T 39999规定...
