431 / | HD | COMBUSTION |
258 | BURNER HAVING ELECTRICAL HEATER OR IGNITER {4} | |
259 | DF | .~> Igniter and separate heater |
260 | DF | .~> Adjacent exposed liquid fuel surface on fuel support {1} |
263 | DF | .~> Igniter in shelter chamber |
264 | DF | .~> Spark electrode in front of or adjacent fuel discharger {2} |