DIELECTRIC

Broadcast antennas for DTV, UHF and VHF; FM broadcast and reception antennas; electric power switches; diplexers; electrical fibre-optic communications transmission lines for fiber-optic audio and video signal transmission; and optical waveguides

cable pressurization units, namely, units for use in forcing dry air into telecommunication cables in order to protect the cables from water damage, such units comprising air compressors, air dryers for the removal of water vapor from compressed air, air pipe manifolds, and access panels for meters and pipes