318 / | HD | ELECTRICITY: MOTIVE POWER SYSTEMS |
34 | DF | PLURAL, DIVERSE OR DIVERSELY CONTROLLED ELECTRIC MOTORS {22} |
90 | DF | .~ Acceleration control {4} |
94 | DF | .~.~ Armature or primary circuit control {1} |
95 | DF | .~.~.~ Series-parallel connections {1} |
96 | .~.~.~.~ With armature circuit impedance |