| 137 / | HD | FLUID HANDLING |
| 803 | DF | FLOW AFFECTED BY FLUID CONTACT, ENERGY FIELD OR COANDA EFFECT (E.G., PURE FLUID DEVICE OR SYSTEM) {11} |
| 808 | DF | .~ Means to cause rotational flow of fluid (e.g., vortex generator) {4} |
| 810 | ![]() | .~.~ Vortex generator as control for system |