337 / | HD | ELECTRICITY: ELECTROTHERMALLY OR THERMALLY ACTUATED SWITCHES |
298 | DF | THERMALLY ACTUATED SWITCHES {7} |
333 | DF | .~ With bimetallic element {9} |
334 | DF | .~.~ With manual or other mechanical contact control means {10} |
337 | DF | .~.~.~ Multiple contact or plural circuit control means {2} |
338 | .~.~.~.~ Plural separate switches {1} | |
339 | DF | .~.~.~.~.~> With interlocking |