缺陷圖片供參考

未融合+氣孔+夾渣

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很清晰，謝謝分享

希望樓主每張都有說(shuō)明

英語(yǔ)稱(chēng)為Elongated Cavities (hollow bead/piping)
摘錄一段原因分析
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.