123 / | HD | INTERNAL-COMBUSTION ENGINES |
52.1 | DF | MULTIPLE CYLINDER {7} |
56.1 | DF | .~ Having rotary output shaft parallel to cylinders {2} |
56.2 | DF | .~.~ Cam on rotary output shaft {4} |
56.3 | DF | .~.~.~ Swash plate type {3} |
56.6 | .~.~.~.~ Multiple swash plate drive |