| 62 / | HD | REFRIGERATION |
| 132 | DF | AUTOMATIC CONTROL {19} |
| 177 | DF | .~ Of external fluid or means {6} |
| 178 | ![]() | .~.~ Diverse control or response {2} |
| 179 | DF | .~.~.~> Plural external fluids or means controlled |
| 180 | DF | .~.~.~> External fluid and refrigeration producer {2} |