337 / | HD | ELECTRICITY: ELECTROTHERMALLY OR THERMALLY ACTUATED SWITCHES |
298 | DF | THERMALLY ACTUATED SWITCHES {7} |
306 | DF | .~ Expansible or vaporizable fluid actuated {12} |
329 | DF | .~.~ Contact structure or composition of material {2} |
330 | .~.~.~ With relative position adjustment means |