缺陷图片供参考

未融合+气孔+夹渣

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很清晰，谢谢分享

希望楼主每张都有说明

英语称为Elongated Cavities (hollow bead/piping)
摘录一段原因分析
These will generally only occur at the roots of welds deposited by manual metal-arc.  On the radiograph they have an appearance similar to that of slag.  The radiographic indication usually has rounded ends and is usually situated above the centre of the root bead.