SY/T 6423.6-2014 石油天然气工业 钢管无损检测方法 第6部分：无缝和焊接（埋弧焊除外）铁磁性钢管纵向和或横向缺欠的全周自动漏磁检测
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更新时间 : 2024-09-15 11:49:58
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