| 123 / | HD | INTERNAL-COMBUSTION ENGINES | 
| 594 | DF | HIGH TENSION IGNITION SYSTEM {28} | 
| 596 | DF | .~ Using capacitive storage and discharge for spark energy {5} | 
| 599 |  | .~.~ Having a magneto {3} | 
| 600 | DF | .~.~.~> Triggering voltage obtained from capacitor charging winding | 
| 601 | DF | .~.~.~> Specific design of charge or trigger winding core | 
| 603 | DF | .~.~.~> Antireverse protection |