| 432 / | HD | HEATING |
| 120 | DF | WORK CHAMBER HAVING HEATING MEANS {12} |
| 159 | DF | .~ Combustion products heat work by contact {19} |
| 179 | DF | .~.~ Work chamber exhaust heats chamber feed {1} |
| 180 | DF | .~.~.~ By regenerative-type heat exchanger {1} |
| 181 | DF | .~.~.~.~ Spaced alternating or successive chamber exhausts feed plural regenerators {1} |
| 182 | | .~.~.~.~.~ Regenerators heat fuel |