| 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} |
| 85.1 | DF | .~.~ Brazing or soldering {9} |
| 85.14 | DF | .~.~.~ With filler metal in circuit {1} |
| 85.15 | | .~.~.~.~ Methods |