| 337 / | HD | ELECTRICITY: ELECTROTHERMALLY OR THERMALLY ACTUATED SWITCHES |
| 298 | DF | THERMALLY ACTUATED SWITCHES {7} |
| 333 | DF | .~ With bimetallic element {9} |
| 373 | ![]() | .~.~ Contact structure or composition of material (e.g., mercury) {1} |
| 374 | DF | .~.~.~> With position adjusting means {1} |