MIL-W-80043C, MILITARY SPECIFICATION, WELDING MACHINE, ARC, DC, TRANSFORMER-RECTIFIER, CONSTANT CURRENT (28 JAN 1981) [S/S BY NEMA-EW1]., This specification covers Arc Welding Machines of the industrial type, rated at 60 percent duty cycle, producing direct current,(DC) constant current output characteristics from a transformer-rectifierpower supply for single operator shielded metal Arc Welding (SMAW)processes.