通过对下向焊焊接工艺和焊口的受力分析，解析出其产生裂纹的原因，提出了相应的防止对策。
The relative Solutions to cracks are given by studying the downhill welding process and cracking stress analysis.
第二种是产生于立柱翼缘与主梁翼缘连接处的坡口焊缝焊趾处的裂纹。
The second crack is a crack originating at the groove weld toe of the column flange-girder flange connection.
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