ISO-IEC 19788-5 2012 Information technology -- Learning education and training -- Metadata for learning resources -- Part 5 Educational elements
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ISO 1039 1995 Cinematography — Cores for motion-picture and magnetic film rolls.pdf
ISO 7308 1987 Road vehicles — Petroleum-based brake-fluid for stored-energy hydraulic br.pdf
ISO 6942 2022 Protective clothing — Protection against heat and fire — Method of test Evaluation of materials and material assemblies when exposed to a source of radi.pdf
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GB-T 23157-2008 进出口儿童可携持游泳浮力辅助器材安全要求及测试方法.pdf
GB-T 11299.3-1989 卫星通信地球站无线电设备测量方法 第一部分 分系统和分系统组合通用的测量 第三节 中频范围内的测量.pdf
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GB-T 20284-2006 建筑材料或制品的单体燃烧试验.pdf
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