318 / | HD | ELECTRICITY: MOTIVE POWER SYSTEMS |
119 | DF | RECIPROCATING OR OSCILLATING MOTOR {4} |
122 | .~ Plural, diverse or diversely controlled motor windings {2} | |
123 | DF | .~.~> Polyphase or diverse or diversely controlled sources of motor supply {1} |
125 | DF | .~.~> Unidirectionally conductive devices in energizing circuit |