... accuracy, low voltage, big current, no high temperature, no arc spatter. The minimum accuracy is 0.01MM (iron piece: ... convenience dexterity.7.Allocating various types of welding head: Convenient and dexterous welding head, pure copper design, highly conductive and ... manual operation.disadvantageNot suitable for large square, lots of welding, or copper, aluminum, ZAS non-iron metalRepairing ways ...