The article discusses problems of safety coefficient caused by open welding of shield beam.
对掩护梁发生开焊而引发的安全系数问题进行了探讨。
In the same time, a calculating formula of welding flat cover special for hydraulic test is deduced by setting certain safety coefficient of hydraulic test.
同时通过对试验压力取一定安全系数，推导出液压试验专用焊接平盖的计算公式。
The temperature difference of welding zone can be decreased with small dipping angle, high dipping speed and low heat exchange coefficient of dipping Zn liquid.
降低浸镀锌液的换热系数，采用小角度快速浸入可以降低焊缝区域温差。
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