337 / | HD | ELECTRICITY: ELECTROTHERMALLY OR THERMALLY ACTUATED SWITCHES |
14 | DF | ELECTROTHERMALLY ACTUATED SWITCHES {9} |
142 | DF | .~ Fusible element actuated {15} |
182 | .~.~ With external or auxiliary heating means {2} | |
183 | DF | .~.~.~> Resistive heater {1} |
185 | DF | .~.~.~> Comprising or including heat storage or accumulator means |