| 62 / | HD | REFRIGERATION |
| 132 | DF | AUTOMATIC CONTROL {19} |
| 177 | | .~ Of external fluid or means {6} |
| 178 | DF | .~.~> Diverse control or response {2} |
| 183 | DF | .~.~> Cooling fluid for heat rejecter, e.g., condenser {1} |
| 185 | DF | .~.~> Indirect heat transfer liquid, e.g., brine |
| 186 | DF | .~.~> Air controller or director {1} |
| 188 | DF | .~.~> By lever, e.g., float-controlled valve |
| 189 | DF | .~.~> By fluid flow, e.g., check valve |