338 / | HD | ELECTRICAL RESISTORS |
68 | DF | MECHANICALLY VARIABLE (E.G., RHEOSTAT) {24} |
118 | DF | .~ Movable contact electrically adjustable over length of resistance element {21} |
128 | .~.~ Plural {3} | |
129 | DF | .~.~.~> Sequentially operated |
130 | DF | .~.~.~> Ganged {3} |
134 | DF | .~.~.~> Individually operated concentric shaft type |