3.9 description operating steps.Welding inspection Bring out the magnetism from the generator caution and check for bugs or blame various of welding with the naked eye, according to the way in which education and then by using the lens zoom characteristics of powder, iron powder are defective steel to be welded are raised, a record seen welded into a save. If using iron powder fluorescent type, then you have to check with the tube. Black Light
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