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本方介绍FCB及RF单面埋弧焊的原理、特点，以及这种高效焊接方法所用的灯机和焊接材料，还给出了这两种方法的焊接工艺条件和焊缝机械性能示例。
This section describes the principles and features of FCB and RF single-sided submerged arc welding, as well as the lamp and welding materials used in this highly efficient welding method, and gives examples of welding conditions and weld mechanical properties for both methods.