这时检查，要比开焊之后才发现靠谱。
It is better to find out at this point than after you start soldering.
对掩护梁发生开焊而引发的安全系数问题进行了探讨。
The article discusses problems of safety coefficient caused by open welding of shield beam.
义齿焊区未见断裂、开焊、变形及腐蚀变色现象。
There was no joint fractures and corrosions and color changes.
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