| 337 / | HD | ELECTRICITY: ELECTROTHERMALLY OR THERMALLY ACTUATED SWITCHES |
| 298 | DF | THERMALLY ACTUATED SWITCHES {7} |
| 306 | DF | .~ Expansible or vaporizable fluid actuated {12} |
| 312 | DF | .~.~ With manual or other mechanical contact control means {4} |
| 314 | ![]() | .~.~.~ Reciprocating or sliding motion {1} |
| 315 | DF | .~.~.~.~> Piston or plunger |