从原材料、焊接材料、焊接工艺三方面分析了中部槽产生裂纹的原因，从而得到一种避免裂纹产生的方法及预防措施。
Through material, weld material, weld technology. Analyses the reason when cracking-fusion product in line pan. Introduces a method of preventing cracking-fusion production.
槽焊接上的第二方面的分歧那里没有足够的空间进入焊缝他们在里面。
Slot welding the 2nd side onto the divisions where there is not enough room for access to weld them on the inside.
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