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} |