337 / | HD | ELECTRICITY: ELECTROTHERMALLY OR THERMALLY ACTUATED SWITCHES |
298 | DF | THERMALLY ACTUATED SWITCHES {7} |
401 | DF | .~ With fusible, combustible or explosive material {5} |
414 | DF | .~.~ Housing, casing or support means {1} |
415 | .~.~.~ Flexible or resilient |