337 / | HD | ELECTRICITY: ELECTROTHERMALLY OR THERMALLY ACTUATED SWITCHES |
298 | DF | THERMALLY ACTUATED SWITCHES {7} |
333 | DF | .~ With bimetallic element {9} |
380 | DF | .~.~ Housing, casing or support structure {1} |
381 | .~.~.~ With significant external circuit connection means |