| 333 / | HD | WAVE TRANSMISSION LINES AND NETWORKS |
| 1 | DF | PLURAL CHANNEL SYSTEMS {4} |
| 100 | DF | .~ Having branched circuits {6} |
| 132 | DF | .~.~ For providing frequency separation {2} |
| 134 | ![]() | .~.~.~ Utilizing long line element {1} |
| 135 | DF | .~.~.~.~> Including waveguide element |