337 / | HD | ELECTRICITY: ELECTROTHERMALLY OR THERMALLY ACTUATED SWITCHES |
14 | DF | ELECTROTHERMALLY ACTUATED SWITCHES {9} |
142 | DF | .~ Fusible element actuated {15} |
222 | DF | .~.~ With switch protective means (for fuse structure) {2} |
223 | .~.~.~ Against shock or recoil |