123 / | HD | INTERNAL-COMBUSTION ENGINES |
434 | DF | CHARGE FORMING DEVICE (E.G., POLLUTION CONTROL) {29} |
672 | DF | .~ Including exhaust gas condition responsive means {11} |
677 | DF | .~.~ Combined with ambient condition responsive means (e.g., pressure) {1} |
678 | .~.~.~ Ambient temperature responsive |