... the weldment is very beautiful! Functions and Features of the welding machine 1) IGBT inverter technology,energy saving, power frequency, no noise ... gas post flow functions:well pspatter control,good depth of fusion,good welding effect! 4)Over current ,Over heat,Over load,Over ... , the workshop of our factory 5)The certification of our welding machine 6)if you have any problem ,pls contact me when ...