| 251 / | HD | VALVES AND VALVE ACTUATION |
| 89 | DF | WITH MEANS FOR BLOCKING OR DISABLING ACTUATOR {6} |
| 101 | DF | .~ Latch manipulator mounted on handle or stem {3} |
| 102 | DF | .~.~ Constrained linear motion {3} |
| 104 | ![]() | .~.~.~ With latch rigidly associated with manipulator {1} |
| 105 | DF | .~.~.~.~> Latch lug extends transversely to axis of manipulator |