Preheating shall be carried out for carbon and low alloy steel welding where required. Preheating temperature shall be kept uniform from the start to the end of welding.
在进行碳钢及低合金钢的焊接时应进行预热。预热温度在焊接开始到结束期间应保持均衡。
Preheating temperature shall be kept uniform from the start to the end of welding.
预热温度在焊接开始到结束期间应保持均衡。
The research indicates that this method can control the welding time of a weld and that the stable and uniform weld formation is acquired.
研究结果表明：该方法能够实现对焊点焊接时间的实时控制，获得均匀稳定的焊缝成形。
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