In order to decrease weld defect, the upper limit welding current should be adopted.
为避免夹渣的产生，在焊接P91焊口时，宜采用焊接工艺评定电流上限焊接。
The ultrasonic phased array system for monitoring the expanding of weld defect in steel bridge was researched.
研制了针对钢结构桥梁焊缝缺陷扩展的超声相控阵监测系统。
Weld defects classification system based on fuzzy reasoning model was established, after analysis of weld defect features in X-ray films.
分析工业X射线底片焊缝缺陷特征，建立用于焊缝缺陷分类识别的模糊推理系统模型。
Weld defects classification system based on fuzzy reasoning model was established, after analysis of weld defect features in X-ray films.
分析工业X射线底片焊缝缺陷特征，建立用于焊缝缺陷分类识别的模糊推理系统模型。
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