FIELD: mechanical engineering; sheet metal welding. SUBSTANCE: welder electrode is made insulated to form of wall. length of shunting bus is smaller than length of electrode by value of two conducting jumpers. Insulator is secured on bus. Conducting jumpers are electrically and mechanically coupled with electrode. EFFECT: possibility of lap welding of large-length metal articles or butt welding of large-thickness articles. 6 dwg
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