174 / | HD | ELECTRICITY: CONDUCTORS AND INSULATORS |
68.1 | DF | CONDUITS, CABLES OR CONDUCTORS {15} |
126.1 | DF | .~ Conductor structure (nonsuperconductive) {6} |
128.1 | DF | .~.~ Plural strand {3} |
129 R | .~.~.~ Assemblies of noncircular section {2} | |
129 B | DF | .~.~.~.~> Bus bars |
129 S | DF | .~.~.~.~> Segmental, reentrant |