219 / | HD | ELECTRIC HEATING |
50 | DF | METAL HEATING (E.G., RESISTANCE HEATING) {19} |
121.11 | DF | .~ By arc {16} |
137.2 | DF | .~.~ With consumable electrode device {4} |
137.31 | DF | .~.~.~ Gun {7} |
137.44 | .~.~.~.~ Having integral electrode guide {2} | |
137.51 | DF | .~.~.~.~.~> With flexibility |
137.52 | DF | .~.~.~.~.~> With wear resistant liner |