| 219 / | HD | ELECTRIC HEATING |
| 50 | DF | METAL HEATING (E.G., RESISTANCE HEATING) {19} |
| 78.01 | DF | .~ For bonding with pressure (e.g., resistance welding) {16} |
| 86.1 | DF | .~.~ By spot bonding {12} |
| 91.2 | | .~.~.~ Methods {4} |
| 91.21 | DF | .~.~.~.~> Of welding through insulation |
| 91.22 | DF | .~.~.~.~> With additional heating to same spot |
| 91.23 | DF | .~.~.~.~> With work deforming |
| 92 | DF | .~.~.~.~> Current limitation (e.g., by interposed insulation) {2} |