____ welding is performed by making the workpiece part of an electrical ____ .electrical power is supplied by a controllable power ____. the supply ____ may be a transformer which converts line voltage or a portable unit with an engine and a generator .the supplied electricity can be ____ current (DC) or ____ current (AC). one ____ of the supply unit is connected via a large ____ cable and ____ to the workpiece

ARC WELDING

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