338 / | HD | ELECTRICAL RESISTORS |
68 | DF | MECHANICALLY VARIABLE (E.G., RHEOSTAT) {24} |
118 | DF | .~ Movable contact electrically adjustable over length of resistance element {21} |
122 | DF | .~.~ Coarse and fine resistance elements {1} |
123 | DF | .~.~.~ Plural elements and plural contacts {1} |
124 | .~.~.~.~ Contacts interlinked (e.g., lost motion type) |