| 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} |
| 101 | DF | .~.~ Butt {3} |
| 104 | DF | .~.~.~ Methods {3} |
| 106 | ![]() | .~.~.~.~ By use of a bridging member (e.g., splice plate) |