| 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 |  | .~.~ By spot bonding {12} |
| 86.21 | DF | .~.~.~> With hand-manipulative portable devices |
| 86.22 | DF | .~.~.~> With separately applied pressure and heat |
| 86.23 | DF | .~.~.~> With welding pressure controlled by the work support |
| 86.24 | DF | .~.~.~> With work orientation means |
| 86.25 | DF | .~.~.~> With significant electrode support {4} |
| 86.9 | DF | .~.~.~> For one-face welding |
| 87 | DF | .~.~.~> Multiple spot type |
| 88 | DF | .~.~.~> Electrode positionable along fixed bus bar (e.g., reaction bar type) |
| 89 | DF | .~.~.~> Fluid pressure actuated electrode |
| 90 | DF | .~.~.~> Plier or tong type |
| 91.1 | DF | .~.~.~> With condition responsive control of the welding process |
| 91.2 | DF | .~.~.~> Methods {4} |