322 / | HD | ELECTRICITY: SINGLE GENERATOR SYSTEMS |
17 | DF | AUTOMATIC CONTROL OF GENERATOR OR DRIVING MEANS {13} |
22 | DF | .~ Plural conditions {1} |
23 | DF | .~.~ Including an electrical condition {1} |
24 | DF | .~.~.~ Plural electrical conditions {1} |
25 | .~.~.~.~ Voltage and current |