... 40mm 2.With arc maitainence device, applicable to automatical Diesel Engine Welder GFS-ZX7-300 Product description:1.Most advanced ... machine of 500A and above can be used for air carbon arc gouging;7.Extensively used in the welding ... boiler, power station construction,nuclear nergy,spaceflight,military industry,industrial installation,bridge building industry,etc. ZX7400I is especially applicable for ...