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Features:

A. insulating layer when welding fuel produces smoke more, ordinary tungsten argon arc welding is easy to burn needles, often changing tungsten needle to take a lot of time, just not mass production.

B. argon arc welding temperature is low (5500 °) slow when welding, weld prone carbonation phenomena, after welding the welds brittle easily broken.

C. using clamps welding faults; backroom, sewing, how workers ' demand for higher production.