343 / | HD | COMMUNICATIONS: RADIO WAVE ANTENNAS |
700 R | DF | ANTENNAS {58} |
907 | DF | .~ Antenna components {3} |
909 | DF | .~.~ Refracting means and radio wave energy filters (e.g., lenses and polarizers) {2} |
911 R | .~.~.~ Dielectric type {1} | |
911 L | DF | .~.~.~.~> Luneberg type |