GB/T 19475.1-2004缩微摄影技术 开窗卡扫描仪制作影像质量的测量方法 第1部分:测试影像的特征Micrographics—Methods of measuring image quality produced by aperture card scanners—Part 1:Characteristics of the test images
GB/T 12689.6-2004锌及锌合金化学分析方法 铅量的测定 示波极谱法The methods for chemical analyisis of zinc and alloys—The determination of lead content—The oscillopolarographic method