137 / | HD | FLUID HANDLING |
154 | DF | DIVERSE FLUID CONTAINING PRESSURE SYSTEMS {7} |
171 | DF | .~ Fluid separating traps or vents {5} |
173 | DF | .~.~ Plural discriminating outlets for diverse fluids {2} |
175 | DF | .~.~.~ Choke or restricted passage gas bleed {1} |
176 | .~.~.~.~ From above liquid level |