337 / | HD | ELECTRICITY: ELECTROTHERMALLY OR THERMALLY ACTUATED SWITCHES |
14 | DF | ELECTROTHERMALLY ACTUATED SWITCHES {9} |
142 | DF | .~ Fusible element actuated {15} |
163 | DF | .~.~ Delayed action (i.e., time lag) {3} |
166 | .~.~.~ With heat absorption, conducting or storage means |