How to weld the straight pipe and flange together?The best way is to use automatic orbital welding machine.But it has a problem that the traditional tungsten needle is in the center,the joint point is on side,the tip of the tungsten needle cannot be aligned with the welding point.How to solve this problems?The tungsten needle angle adjustment device can make it works.It can adjust the angle of the tungsten needle and the distance to the welding point arbitrarily, so as to achieve the perfect arc starting effect.

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