123 / | HD | INTERNAL-COMBUSTION ENGINES |
41.01 | DF | COOLING {27} |
41.56 | DF | .~ Air-cooled {7} |
41.6 | .~.~ Steam dividing vanes, baffles, conduits, or the like for multiple cylinders {2} | |
41.61 | DF | .~.~.~> Individual deflecting cylinder baffles |
41.62 | DF | .~.~.~> Air duct with discharge ports or conduits |