361 / | HD | ELECTRICITY: ELECTRICAL SYSTEMS AND DEVICES |
1 | DF | SAFETY AND PROTECTION OF SYSTEMS AND DEVICES {32} |
117 | DF | .~ High voltage dissipation (e.g., lightning arrester) {10} |
126 | DF | .~.~ Current limiting material in discharge path {1} |
127 | DF | .~.~.~ Nonlinear material (e.g., valve type) {1} |
128 | .~.~.~.~ With plural gaps in discharge path |