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Resistance welding welding machine power supply melts metal locally by generating resistance heat through current passing through the workpiece, thus achieving welding. Resistance butt welding machine advantages include high efficiency, no need for filler materials, wide application range, and suitability for automated production; but precision resistance welding's disadvantages are that precision resistance welding machine has requirements on material thickness, the electrode wears quickly, and the joint appearance is poor.
The resistance spot welding machine is equipped for resistance seam welding, utilizing resistance welding electrodes.