123 / | HD | INTERNAL-COMBUSTION ENGINES |
319 | DF | ENGINE SPEED REGULATOR {16} |
349 | DF | .~ Having condition responsive means with engine being part of a closed feedback system (e.g., cruise control) {4} |
350 | DF | .~.~ Electrical sensing or regulating {3} |
362 | .~.~.~ Cold engine control |