102 / | HD | AMMUNITION AND EXPLOSIVES |
200 | DF | IGNITING DEVICES AND SYSTEMS {15} |
221 | DF | .~ Arming devices {2} |
222 | DF | .~.~ Blocking or interrupting type {7} |
254 | .~.~.~ Slide or rotor {2} | |
255 | DF | .~.~.~.~> Timing device operated |
256 | DF | .~.~.~.~> Spring operated |