| 337 / | HD | ELECTRICITY: ELECTROTHERMALLY OR THERMALLY ACTUATED SWITCHES |
| 2 | ![]() | WITH SEPARATE DISTINCT DIVERSE ART-TYPE SWITCHING DEVICE (E.G., FLUID- OR MECHANICAL-ACTUATED) {2} |
| 3 | DF | .~> Bimetallic device with other |
| 4 | DF | .~> Fusible element device with other {4} |