335 / | HD | ELECTRICITY: MAGNETICALLY OPERATED SWITCHES, MAGNETS, AND ELECTROMAGNETS |
2 | DF | ELECTROMAGNETICALLY ACTUATED SWITCHES {30} |
47 | DF | .~ Utilizing conductive liquid (e.g., mercury) {4} |
49 | DF | .~.~ With liquid-displacement means {3} |
54 | .~.~.~ Tiltable or rotating liquid chamber |