... or intermittent welding. ~Easy operation,high speed. I. NB SERIES WELDER Model : NB-200Y/250Y/250 II.MAIN TECHNICAL PARAMETER III.STANDARD ... CIRCUIT FEEDBACK,CONSTANT VOLTAGE OUTPUT,WORKABLE FOR WIDE VOLTAGE RANGE. 3.CONTROLLED BY ELECTRONIC REACTOR,WELDING PERFORMANCE IS STABLE,LITTLE SPATTER ... . 8.SMALL SIZE,LIGHT WEIGHT,EASY OPERATION,ECONOMICAL AND PRACTICAL. NB SERIES WELDER