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GB/T 11809-2021 压水堆燃料棒焊缝检验方法金相检验和X射线照相检验 Test method of weld of fuel rod for PWR- Me...2023-06-06

GB/T 35316-2017 蓝宝石晶体缺陷图谱 Collection of metallographs on defects of sapphire crystal2023-06-01