SY/T 6423.8-2017 石油天然气工业 钢管无损检测方法 第8部分:无缝和焊接(埋弧焊除外)钢管纵向和或横向缺欠的全周自动超声检测

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更新时间 : 2024-09-16 14:52:32


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