conveying the basic operation of the mechanical SMAW

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SMAW is to look under the mask and stop operation. Due to poor visibility, poor working conditions. Thus to ensure the welding quality, not just request a more skilled operation techniques, should also be noted the force is highly concentrated. For beginners to practice should pay attention to: current suitable electrode to the positive, the arc is short, do not fast welding speed, trying to average.
Prior to welding, liquidation of the workpiece joints on both sid es of 20mm within the exterior clean (eliminate rust, oil, water), and the electrode end of the metal core exposed in order to stop the short-circuit arc. Arc approach has two kinds of percussion and friction law; which the friction law analogy is easy to control, suitable for beginners arc operation.